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Death of Long and Low Geometry
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There's been a convergence in the bike industry to Trek's middle of the road geometry. I can't say I blame the industry for moving towards that direction, but I believe the trend is preventing us from achieving faster, more aero positions.

My position, which doesn't seem extreme by any means, cannot be replicated on a single super bike due to the lack of reach, excess stack, and lack of extension tilt.



My only option for a faster frame is picking up a used P4, which is still a bit of compromise with the rear braking and wheel with limitations.

How do you guys feel about bike geometry? What would you like to see in the future?
Last edited by: Nick B: Oct 22, 14 9:15
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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The Felt DA series appears to be long and low. Is that an option for you?

jaretj
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Re: Death of Long and Low Geometry [jaretj] [ In reply to ]
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jaretj wrote:
The Felt DA series appears to be long and low. Is that an option for you?

jaretj

I don't consider the Felt DA series a superbike based on it's drag numbers.
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Re: Death of Long and Low Geometry [jackmott] [ In reply to ]
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On a sz 51 NP2/3 I'd have to use a 160mm stem.
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Re: Death of Long and Low Geometry [jackmott] [ In reply to ]
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jackmott wrote:
size way down and use a really long stem?


worked for Crowie

(in the same position OP, the Slice RS maybe?)

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Last edited by: leegoocrap: Oct 22, 14 9:19
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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I had a 54 P2 with a slammed -25* stem and was able to move to a Shiv TT (L) with no issues. Probably could have gone with a Medium as well, but the Pad Reach for the L was bang-on my number (495). I use the forward SP, but the bike can get pretty damn long with the rear SP (although it may close your hip angle).

But I hear ya.....Long & Low is definitely phasing out in regards to bike selection. I don't see me getting rid of my Shiv TT anytime soon as a result (well that and the fact that it is pretty damn slippery!!) My LTS keeps trying to get me to go to a Shiv Tri, but there is no way I could ride one. Either I can't get low enough or I would need a stoopid long stem. I have no interest in riding a 130mm stem on a tri bike.

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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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I'm curious...can we add some pad stack and reach numbers to this conversation? i.e. what are the horizontal and vertical distance from the bb to your arm pads?
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Wait, maybe I missed something. Is there good drag data for the newer felt da somewhere?
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Re: Death of Long and Low Geometry [Runless] [ In reply to ]
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Runless wrote:
Wait, maybe I missed something. Is there good drag data for the newer felt da somewhere?
^^^This. When did the DA "fall out" of the superbike category????

-Stephen in Arkansas
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Re: Death of Long and Low Geometry [razorbacksteve] [ In reply to ]
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Marginally faster than a Shiv which is ~ Old P3 at low yaw.
Last edited by: Nick B: Oct 22, 14 10:07
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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The Giant Trinity Advanced is pretty long and low.
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Re: Death of Long and Low Geometry [Rover24] [ In reply to ]
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Rover24 wrote:
The Giant Trinity Advanced is pretty long and low.

Not a super bike either, has similar performance to an old p3.
Last edited by: Nick B: Oct 22, 14 10:08
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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I agree it is getting harder to find. Im almost 6'4" with a 32" inseam. I ended up on a speed concept 9 series with the extensions as low as possible in order to get moderately aggressive.

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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Nick B wrote:
[Felt DA]Marginally faster than a Shiv which is ~ Old P3 at low yaw.


I thought it was Transition ~ P3C. It's safe to assume SHIV > Transition.


Last edited by: Jamaican: Oct 22, 14 10:23
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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I feel like the newest SC gives some good long-low options...


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Re: Death of Long and Low Geometry [Jamaican] [ In reply to ]
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To the OP, have you tested this position? I note that your chest is almost downsloping, and you are possibly showing more back to the wind than necessary. Steve hed used to say he aimed for a chest angle close to about 5 degrees above horizontal and that a flat chest was too low usually.

so, you may be too low.

second, your body type is likely an outlier. I mean, you have an adjustable stem on what is one of the longest/lowest bikes.

Third, I think faster bikes than your alloy p3 but close in geometry are the shiv tt, felt da, or qr cd.01. Or you can sit around waiting for another swing in geometry trends which may never come...
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Good info. Where is that data from?

-Stephen in Arkansas
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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I noticed a few things in your position which lead to the requirement of super long and low (Trek's older OCLV frames were notoriously long and low 56 TT + 51ST c-c, but not super bike today).

1. Long torso,
2. shorter legs,
3. sit very much forward,
4. humped back.

Re 1 and 2, we are all built a bit differently, nothing one can do. Re 3, have you tried sliding back a bit? Your hip angle is amply open. Re 4, this may be less aero than a flat back. In other words, your elbows may get a bit higher without becoming less aero.

Of course this is all speculation from looking at a single picture. Purely for your reference.

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Re: Death of Long and Low Geometry [Jamaican] [ In reply to ]
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Jamaican wrote:
Nick B wrote:
[Felt DA]Marginally faster than a Shiv which is ~ Old P3 at low yaw.


I thought it was Transition ~ P3C. It's safe to assume SHIV > Transition.

The data suggests Transition ~ Shiv at the most common yaw angles.
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Re: Death of Long and Low Geometry [Runless] [ In reply to ]
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Runless wrote:
To the OP, have you tested this position?


I'm sure he did. I remember seeing Wind Tunnel pics at some point.

#stalker


Last edited by: Jamaican: Oct 22, 14 10:45
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Re: Death of Long and Low Geometry [Runless] [ In reply to ]
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Runless wrote:
To the OP, have you tested this position? I note that your chest is almost downsloping, and you are possibly showing more back to the wind than necessary. Steve hed used to say he aimed for a chest angle close to about 5 degrees above horizontal and that a flat chest was too low usually.

so, you may be too low.

second, your body type is likely an outlier. I mean, you have an adjustable stem on what is one of the longest/lowest bikes.

Third, I think faster bikes than your alloy p3 but close in geometry are the shiv tt, felt da, or qr cd.01. Or you can sit around waiting for another swing in geometry trends which may never come...

The position was optimized during a wind tunnel session without an aero front wheel and a much less aero frame with a CdA of 0.257 w/ tare. Looking at some files from races my current CdA is 0.235-0.240 with full gear. Switching to a faster frame will drop me to ~0.225.
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Re: Death of Long and Low Geometry [threefire] [ In reply to ]
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threefire wrote:
I noticed a few things in your position which lead to the requirement of super long and low (Trek's older OCLV frames were notoriously long and low 56 TT + 51ST c-c, but not super bike today).

1. Long torso,
2. shorter legs,
3. sit very much forward,
4. humped back.

Re 1 and 2, we are all built a bit differently, nothing one can do. Re 3, have you tried sliding back a bit? Your hip angle is amply open. Re 4, this may be less aero than a flat back. In other words, your elbows may get a bit higher without becoming less aero.

Of course this is all speculation from looking at a single picture. Purely for your reference.

My power really suffers if I close the hip angle anymore.
Last edited by: Nick B: Oct 22, 14 10:52
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Re: Death of Long and Low Geometry [Runless] [ In reply to ]
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that bike is too small/short for him.

if he had a bigger size he'd be less egg-shaped and more able to disappear behind shrugged shoulders/head

so basically, I agree with you

Runless wrote:
To the OP, have you tested this position? I note that your chest is almost downsloping, and you are possibly showing more back to the wind than necessary. Steve hed used to say he aimed for a chest angle close to about 5 degrees above horizontal and that a flat chest was too low usually.

so, you may be too low.

second, your body type is likely an outlier. I mean, you have an adjustable stem on what is one of the longest/lowest bikes.

Third, I think faster bikes than your alloy p3 but close in geometry are the shiv tt, felt da, or qr cd.01. Or you can sit around waiting for another swing in geometry trends which may never come...

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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Nick B wrote:
There's been a convergence in the bike industry to Trek's middle of the road geometry. I can't say I blame the industry for moving towards that direction, but I believe the trend is preventing us from achieving faster, more aero positions.

My position, which doesn't seem extreme by any means, cannot be replicated on a single super bike due to the lack of reach, excess stack, and lack of extension tilt.



My only option for a faster frame is picking up a used P4, which is still a bit of compromise with the rear braking and wheel with limitations.

How do you guys feel about bike geometry? What would you like to see in the future?

The bike companies like auto companies have to make money, not cater to race car drivers. The bulk of the market needs a moderate performance Jetta/Golf not a high end Porsche or an F1 V12. Just size down and use a long stem and let the bike companies service the bulk of the market!
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Just out of interest, which bikes do you consider in the bracket of 'superbikes' ?
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Nick B wrote:
Jamaican wrote:
Nick B wrote:
[Felt DA]Marginally faster than a Shiv which is ~ Old P3 at low yaw.


I thought it was Transition ~ P3C. It's safe to assume SHIV > Transition.


The data suggests Transition ~ Shiv at the most common yaw angles.

That's actually really interesting. Do you have the data that supports this and would you mind sharing?
thanks.
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Re: Death of Long and Low Geometry [Garet Jax] [ In reply to ]
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Nick B wrote:
My position, which doesn't seem extreme by any means

^ First you post this

Nick B wrote:

^ Then you post this.

The two don't match. This is an aggressive position. It might be your fastest and most comfortable - I'm no aerodynamicist and no fitter - but it's definitely an outlier.

Plus, even if it was tested fast, there might be a position that's as fast that doesn't involve turning you into the hunchback of Notre Dame...

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Re: Death of Long and Low Geometry [tessartype] [ In reply to ]
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Just a few posts up, he talks about the testing he's done in the wind tunnel.

-Stephen in Arkansas
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Re: Death of Long and Low Geometry [tessartype] [ In reply to ]
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tessartype wrote:
The two don't match. This is an aggressive position. It might be your fastest and most comfortable -

I don't think the word "aggressive" means what you think it means. There is nothing aggressive about what he's doing there. He's just sitting there. Passively even.


tessartype wrote:
I'm no aerodynamicist and no fitter - but it's definitely an outlier.

if you ever do become one, or even visit one, please please don't use nor encourage the use of the word "aggressive"

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Re: Death of Long and Low Geometry [tessartype] [ In reply to ]
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I don't think his position is an outlier. Average Cat3/2/1 time trial position. Shoulders aren't even with hips like Zabriskie or anything.

Or that his hunchback is necessarily bad. Looks like an airfoil with an aero helmet on I bet. See: Tony Martin

Most triathletes just don't take position very seriously. Too much whining about comfort and power without trying to get low, powerful, and comfortable.



tessartype wrote:
The two don't match. This is an aggressive position. It might be your fastest and most comfortable - I'm no aerodynamicist and no fitter - but it's definitely an outlier.

Plus, even if it was tested fast, there might be a position that's as fast that doesn't involve turning you into the hunchback of Notre Dame...



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Re: Death of Long and Low Geometry [razorbacksteve] [ In reply to ]
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I, like a previous poster, would be interested in arm pad stack and reach.
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Re: Death of Long and Low Geometry [Runless] [ In reply to ]
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Runless wrote:
I, like a previous poster, would be interested in arm pad stack and reach.

Pad stack (including Ceegee pads): 545mm
Pad reach (where elbows would touch): 545mm

Funny how that worked out.
Last edited by: Nick B: Oct 22, 14 11:52
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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If you could somehow get hold of an X-Lo Aduro, a 51cm P5 would work. You would have to modify the Aduro to make it safe but that is pretty easy.


Nick B wrote:
Runless wrote:
I, like a previous poster, would be interested in arm pad stack and reach.

Pad stack: 545mm
Pad reach (where elbows would touch): 545mm

Funny how that worked out.



Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter
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Re: Death of Long and Low Geometry [ericM40-44] [ In reply to ]
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ericM40-44 wrote:
tessartype wrote:

The two don't match. This is an aggressive position. It might be your fastest and most comfortable -

I don't think the word "aggressive" means what you think it means. There is nothing aggressive about what he's doing there. He's just sitting there. Passively even.


tessartype wrote:
I'm no aerodynamicist and no fitter - but it's definitely an outlier.

if you ever do become one, or even visit one, please please don't use nor encourage the use of the word "aggressive"

X 100000
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Re: Death of Long and Low Geometry [razorbacksteve] [ In reply to ]
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he rides a saddle designed for rotating pelvis on the nose and does not rotate pelvis. if he did rotate pelvis, he might need a longer reach

should post pad stack/reach numbers if he wants input
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Re: Death of Long and Low Geometry [jackmott] [ In reply to ]
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It's still a bit too tall/narrow.

Cervelo measures their stack/reach without the cushions and middle of the arm rest cup.
Last edited by: Nick B: Oct 22, 14 11:58
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Re: Death of Long and Low Geometry [ericM40-44] [ In reply to ]
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ericM40-44 wrote:
tessartype wrote:
The two don't match. This is an aggressive position. It might be your fastest and most comfortable -

I don't think the word "aggressive" means what you think it means. There is nothing aggressive about what he's doing there. He's just sitting there. Passively even.


tessartype wrote:
I'm no aerodynamicist and no fitter - but it's definitely an outlier.

if you ever do become one, or even visit one, please please don't use nor encourage the use of the word "aggressive"

This. The position is very comfortable.

For the other comments about the back shape, I'd be classified under John Cobb's "B" styled back.

Fairly similar to Tom A's position in terms of drop, torso angle, extension angle, except his saddle is pushed further back.


Last edited by: Nick B: Oct 22, 14 12:14
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Re: Death of Long and Low Geometry [devashish_paul] [ In reply to ]
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I feel you. I have just gone down from a M to a S on my Shiv - still using a negativ stem and low stack aerobar. This is the absolutely lowest anyone can get a small shiv. I dont get this geometry at all. Of course they dont want mad customers with back pains but why design a bike with low drag as a major point and then not even make it possible to SIT aero on it?? Sure I have short-ish legs but I am in no way strangely built.


I need to tuck my head.

Endurance coach | Physiotherapist (primary care) | Bikefitter | Swede
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Nick B wrote:
Runless wrote:
I, like a previous poster, would be interested in arm pad stack and reach.

Pad stack (including Ceegee pads): 545mm
Pad reach (where elbows would touch): 545mm

Funny how that worked out.

Unless I'm reading something incorrectly, a Fuji Norcom Straight in size M/L fitted with a reasonable-length stem and some better handlebars would 1) allow you to achieve your desired position, 2) be a significant improvement aerodynamically over your current bike (although maybe not in the same league as, e.g., a P5), and 3) let you avoid the issues you have w/ the P4.
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Re: Death of Long and Low Geometry [Andrew Coggan] [ In reply to ]
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Andrew Coggan wrote:
Unless I'm reading something incorrectly, a Fuji Norcom Straight in size M/L fitted with a reasonable-length stem and some better handlebars would 1) allow you to achieve your desired position, 2) be a significant improvement aerodynamically over your current bike (although maybe not in the same league as, e.g., a P5), and 3) let you avoid the issues you have w/ the P4.

I was thinking about the NS but I wasn't entirely sure about the stem/frame compatibility. Does the NS accept most stems without clearance issues?

About how much slower would you say a NS is to a P5-3, frame only?
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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I don't know Nick B, but I would like to second his issue. I am a little guy and I ride low up front. I have not been to a wind tunnel, but based on power produced versus speed and some loose Chung style analysis, I have a decently low CdA. I also can not replicate the same position shown below on a super bike.

The below is a picture is P4 with a fixed negative stem on nearly zero stack devox bars. I don't have the bike with me and I haven't measured in a while, but I think the BB to pad Stack and Reach is 485 x 470. Looking at my body, my power vs speed, and my run off the bike, I don't think that there is anything wrong with the position (again it is not wind tunnel approved). What I can say is that while this P4 is a 51, I can't replicate this position on a 48 Felt IA (I think that one gets to the 500 stack range), the 48 P5-6 (maybe if I got rid of the integrated bars, but then what's the point of going with the six and would I be any faster than the P4 anyway), or the Trek SC.

I might be able to make something work with some crazy stem work, but then am I really gaining anything over the P4.

Why would I want a different bike than the P4 you ask: 1 - I would like to be faster if possible, 2 - the rear brake is a bitch to work on, 3 - the rear brake doesn't do a great job of actually braking, 4 - fitting rear wheels has taken way more effort than it should (filing down brake pads) 5 - I would like some of the newer TRI stuff that the bikes have now (like on board storage or bosses on the top tube, etc), 6 - while my Omega front brake is good (when compared to a traditional side pull), I sure like the look of the IA or the P5 where there is nothing but head tube showing up front.



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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Nick B wrote:
Andrew Coggan wrote:
Unless I'm reading something incorrectly, a Fuji Norcom Straight in size M/L fitted with a reasonable-length stem and some better handlebars would 1) allow you to achieve your desired position, 2) be a significant improvement aerodynamically over your current bike (although maybe not in the same league as, e.g., a P5), and 3) let you avoid the issues you have w/ the P4.

I was thinking about the NS but I wasn't entirely sure about the stem/frame compatibility. Does the NS accept most stems without clearance issues?

About how much slower would you say a NS is to a P5-3, frame only?

No, you'd definitely be a bit limited there. But, nothing wrong with the Oval Concepts stem (aside from maybe the price); you'd just have to get a longer one, then run whatever bars you want. Alternatively, the Pro Missile Evo II bar/stem combo is a good option.

As for the Norcom Straight vs. a P5-3, you'd probably be giving up a little bit...but no more than if you went w/ a P4.
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Re: Death of Long and Low Geometry [bufit323] [ In reply to ]
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bufit323 wrote:
: 1 - I would like to be faster if possible,


Maybe learn to pin a number on better then? Wink

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Re: Death of Long and Low Geometry [mortysct] [ In reply to ]
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mortysct wrote:



I need to tuck my head.

Tucking your head is at the top of the list of things going on with your head?

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Re: Death of Long and Low Geometry [Power13] [ In reply to ]
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Power13 wrote:
bufit323 wrote:
: 1 - I would like to be faster if possible,



Maybe learn to pin a number on better then? Wink

No shit right! Note that there is a different number on my seat post. I did a TRI the day before out of state. I came home and overslept and did a 40k TT the next morning. I was late I barely made the start. This nice lady offered to pin me up "really well and in a great spot." I was like GREAT! just get me to the gate in the next 5 minutes. I did the race and went something like 57:30 on 240 watts and was very happy. I never saw the number until I got the picture, then I was all WTF! That lady screwed me out of some real time!

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Re: Death of Long and Low Geometry [bufit323] [ In reply to ]
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bufit323 wrote:
I did the race and went something like 57:30 on 240 watts and was very happy




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Re: Death of Long and Low Geometry [Jamaican] [ In reply to ]
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2014: a little slower 57:52 http://www.lambra.org/...LAMBRA_TT_2014_r.htm

2013: a little faster 57:28: http://www.lambra.org/...LAMBRA_TT_2013_r.htm

2012: first TT ever 59:41 riding a P1 with a wheel cover and a SRAM 80 front (different PM but I think it was still around 240 or so): http://www.lambra.org/...LAMBRA_TT_2012_r.htm


I would love to tell you I did better then 240 on both days, but alas, my FTP has been pretty much stuck there (too much running and too much IM training and not enough Z4+ training). I might have been 239 on one of them and 242 on the other. I can't really remember that fine a detail on it.

ETA: I am James Martin, so you know who you are looking for on the results above.

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Last edited by: bufit323: Oct 22, 14 13:42
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Ritchey makes a C260 stem with a 25 degree rise. You can use it upside down and really get some good lowering of the basebar out of the deal, assuming you've already removed all the steerer tube spacers below the stem. Other than than, you can play tricks with your arm rests to get them lower, but that depends on your comfort level with fabricating your own parts.

I'd be careful getting a frame that's too small and running a longer stem. I've done that before, and it can be very difficult to manage the handling with that much weight being over the front wheel. You might have a different experience though.
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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This is best post I've ever seen on Slowtwitch in a long time! It's way up there with stuff that Josh Poertner posts and Slowman's posts on bike fitting. Mark this one down, folks, and read Nick B's post very carefully.

Frame stack is getting taller, which means that there's very little left to fit fast, low riders. Worse still, frame stack eats away at other ways to attain the same rider stack. I'd rather use aero armpad spacers, for example, than let an ugly non-aero head tube take up the stack. Tall head tubes are getting in the way of aerodynamics.

Well said, Nick B!

AndyF
bike geek
Last edited by: AndyF: Oct 22, 14 13:41
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Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
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I'll give you this...when a guy like me with major neck injuries rides with zero spacers on the new P3 (size 51, I am 5'6"), then the stack height is indeed high. This is the highest stack 51/small bike I have ever used. I probably would have been fine on the 48 with 1 cm of spacers and a slightly longer stem. If I was 25 again, I'd need a negative rise stem

Having said that from the perspective of making money, there are more of "today's me" than you guys or yesterday's version of me (I used to ride with a look ergo stem with stem slammed down so that my base bar was barely 2 inches above the tire....but that was 20 years ago). The market for TT bikes for guys in your range is very small. Take the bottom 97% of the 40-59 year old age group and those are the people buying tri bikes in volume. Build bikes optimized around them and they will make you good revenue...the rest of you guys will need to suck it up and get negative rise stems etc. The market has spoken and we're the buyers, not you, so yes, I agree, in general the long and low bike should go the way of the dodo bird, not because it has no technical place, it just does not have decent business case. It's the same reason why WTC caters to the same group of age groupers over pros. That's who the market is...fast guys don't matter as much from the business perspective, at least you don't lose that many volume sales missing out on a few fast guys.
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Re: Death of Long and Low Geometry [devashish_paul] [ In reply to ]
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devashish_paul wrote:
there are more of "today's me" than you guys or yesterday's version of me .

Dev, there is only one you. you are one of a kind ;)

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Re: Death of Long and Low Geometry [devashish_paul] [ In reply to ]
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We all know why, Paul. It doesn't make it easier to take.

Someone needs to make extremely tall, safe aero-profiles armpad spacers. I'd rather have those than a big honking head-tube.

I also want to add this: Most new bikes leave the shop with fits that are performed by people who are not qualified to do fits. This leads to a lot of dissatisfaction and grumbling. There's also the perception that you need to be super-flexible to use a bike with a short frame stack. That's not at all the case. You really just need to find a very good bike fitter.

AndyF
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Re: Death of Long and Low Geometry [ericM40-44] [ In reply to ]
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Amazing how they optimized the P3 around me and they are selling so many to normal people :-). What a fool that Damon Rinard guy is. He did not even know he was optimizing it around my limitations when he was designing it !!! Now if he can just remove the seat tube and seat stays and deliver the beam version, I will be set for life.

I really have to pull you guys up a picture of my set up from ITU World's 1994. I could literally put my nose on the front tire if I wanted to. Helps to be 29 vs 49 though!

Dev
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Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
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AndyF wrote:
This is best post I've ever seen on Slowtwitch in a long time! It's way up there with stuff that Josh Poertner posts and Slowman's posts on bike fitting. Mark this one down, folks, and read Nick B's post very carefully.

Frame stack is getting taller, which means that there's very little left to fit fast, low riders. Worse still, frame stack eats away at other ways to attain the same rider stack. I'd rather use aero armpad spacers, for example, than let an ugly non-aero head tube take up the stack. Tall head tubes are getting in the way of aerodynamics.

Well said, Nick B!

Means a lot coming from one of the legends!
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Re: Death of Long and Low Geometry [bufit323] [ In reply to ]
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your helmet is too big.

if that's a 4000s 23mm that's not a good choice for a TT. Kona, maybe.

whatever it is that you're wearing is probably not the fastest choice.

well done on the P4, best bike ever made, if paired with 3T Ventus and all blacked out components and wheels. You might want to search for a -17 version out there somewhere

bufit323 wrote:
I don't know Nick B, but I would like to second his issue. I am a little guy and I ride low up front. I have not been to a wind tunnel, but based on power produced versus speed and some loose Chung style analysis, I have a decently low CdA. I also can not replicate the same position shown below on a super bike.

The below is a picture is P4 with a fixed negative stem on nearly zero stack devox bars. I don't have the bike with me and I haven't measured in a while, but I think the BB to pad Stack and Reach is 485 x 470. Looking at my body, my power vs speed, and my run off the bike, I don't think that there is anything wrong with the position (again it is not wind tunnel approved). What I can say is that while this P4 is a 51, I can't replicate this position on a 48 Felt IA (I think that one gets to the 500 stack range), the 48 P5-6 (maybe if I got rid of the integrated bars, but then what's the point of going with the six and would I be any faster than the P4 anyway), or the Trek SC.

I might be able to make something work with some crazy stem work, but then am I really gaining anything over the P4.

Why would I want a different bike than the P4 you ask: 1 - I would like to be faster if possible, 2 - the rear brake is a bitch to work on, 3 - the rear brake doesn't do a great job of actually braking, 4 - fitting rear wheels has taken way more effort than it should (filing down brake pads) 5 - I would like some of the newer TRI stuff that the bikes have now (like on board storage or bosses on the top tube, etc), 6 - while my Omega front brake is good (when compared to a traditional side pull), I sure like the look of the IA or the P5 where there is nothing but head tube showing up front.


Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting

“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.â€
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Nick B wrote:
Means a lot coming from one of the legends!

This made me spray my drink. Legends?! :-)

I am only stating what I saw while working with the very best bike fitters. Things that prevent them from finding the best fit for fast riders.

AndyF
bike geek
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Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
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I have this mental list of the slowtwitch forumite greats. You on my list bro.
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Re: Death of Long and Low Geometry [ericM40-44] [ In reply to ]
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ericM40-44 wrote:
your helmet is too big.

if that's a 4000s 23mm that's not a good choice for a TT. Kona, maybe.

whatever it is that you're wearing is probably not the fastest choice.

well done on the P4, best bike ever made, if paired with 3T Ventus and all blacked out components and wheels. You might want to search for a -17 version out there somewhere

Tell me more about the helmet, do you mean the tail or the front? I am open to suggestions on a better one. That one hugs my back pretty well nearly all the time, which I figured was the most important thing.

Yep, that is a 4000s 23. 40k TT is something I do once a year more for FTP data point and CdA verification than anything else, I am not interested in buy special gear just for that 1 hour (ie no booties either).

On the clothing, this is 2013 and that is a De Soto Riviera Top and a Forza Pair of shorts. In 2014 I wore the PI Octane for most of the year (40k TT included). I was one of the people that never experienced documented gains on the bike and I definitely felt like it inhibited me temperature wise on the run so I sold it. Still looking for gains on that front for next year. This outfit is good, but I am sure a super tight aero jersey that I strip off for the run would be better. Like all of us, I am trying to find the best clothing combination to limit overall time from start to finish and that varies so much depending on if it is wetsuit legal or not, if it is warm or not, etc. I agree that for a 40k TT, there is a better clothing option than what is shown in the picture, I just don't own it and am probably not going to buy it unless it helps get me to the long course finish line faster.

That is a negative stem, I just don't remember off hand how negative it is. I had a -35 adjustable for a while and was totally comfortable that low, but I never saw any CdA improvement in my testing and I HATED the fact that no mater how tight it was, there was always a little flex in the stem, routing cables also got to be a pain when the extensions are that low.

This was it with the adjustable stem (and new paint following a hard crash and some carbon repair).


Bike is still in the hands of TBT on the way back from last race. While it has been gone, I have had some serious bike envy . . .if I had a good fit on an IA, P5-6or an SC, I probably would have dropped the coin already.

Ironman Certified Coach

Currently accepting limited number of new athletes
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Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
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AndyF wrote:
We all know why, Paul. It doesn't make it easier to take.

Someone needs to make extremely tall, safe aero-profiles armpad spacers. I'd rather have those than a big honking head-tube.

I also want to add this: Most new bikes leave the shop with fits that are performed by people who are not qualified to do fits. This leads to a lot of dissatisfaction and grumbling. There's also the perception that you need to be super-flexible to use a bike with a short frame stack. That's not at all the case. You really just need to find a very good bike fitter.

I totally agree with what you are saying being one of the guys who could never get "low enough bikes" and riding with my ergo stem like Boardman. But, the market for those types of riders is really small. In the end, the economics does not favour servicing this category of rider. And while I know what you are saying about flexibility, this only applies for fully able bodied riders. If you had a neck of back injury, there are limitations, and the market from older riders carrying old injuries that limit what they do, it likely larger than the super fast (and generally younger) market segment.
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Re: Death of Long and Low Geometry [devashish_paul] [ In reply to ]
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Dev, most ppl dont have injuries keeping them from obtaining a faster position.

The problem lies with inappropriate fitters and use of words like "comfort" and "aggressive"
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Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
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AndyF wrote:
This is best post I've ever seen on Slowtwitch in a long time! It's way up there with stuff that Josh Poertner posts and Slowman's posts on bike fitting. Mark this one down, folks, and read Nick B's post very carefully.

Frame stack is getting taller, which means that there's very little left to fit fast, low riders. Worse still, frame stack eats away at other ways to attain the same rider stack. I'd rather use aero armpad spacers, for example, than let an ugly non-aero head tube take up the stack. Tall head tubes are getting in the way of aerodynamics.

Well said, Nick B!

Now, a lot of things could be said about what I am about to say... BUT

I probably see a lot more of the "average consumer" than you do, and this trend is probably a good thing for a lot of them.

I'm not saying it's a good thing for everybody...but from both a marketing and a consumer engagement standpoint I think it is a good thing.

So far in this thread, on Slowtwitch (which is the niche of the niche insofar as the tri world is concerned) we have seen 2 dissenters (maybe 3, can't really tell what DevPaul is at this point) with the current geometry trend. I'm not sure if you count as a dissenter or not...but it sounds like yes you are so that's 4 dissenters. 4. So far.

My two cents.
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Re: Death of Long and Low Geometry [Jim Martin] [ In reply to ]
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Jim Martin wrote:

That is a sweet paint job. When you did the carbon repair and paint, did you consider adding some top tube storage bosses? It's not a hard job for a carbon frame expert.

Greg @ dsw

Advanced Aero TopTube Storage for Road, Gravel, & Tri...ZeroSlip & Direct-mount, made in the USA.
DarkSpeedWorks.com.....Reviews.....Insta.....Facebook

--
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Nick B wrote:
Dev, most ppl dont have injuries keeping them from obtaining a faster position.

The problem lies with inappropriate fitters and use of words like "comfort" and "aggressive"

Come back when you are 55 or even 45. Most of those athletes have a variety of limitations. You don't have any clue what you are talking about "yet". There is a reason the long and low bikes are becoming less available...you only see yourself and your immediate peers. Product managers across the industry see the needs of the entire user base and what will maximize revenue. They just have a bigger sample size in terms of assessing ROI than you or I might.

Have you ever taken a new product to market that requires a big R&D investment, product take to market cost and must have a reasonable product life span/longevity in the market? View it from that angle, and you'll understand why your particular needs (which by the way, were mine 20 years ago) are not being serviced. Back in the day we had to do like Boardman slamming the bars down with an ergo stem. Then long and low bikes came around and we could ride them with normal stems. Then the product managers found that all these athletes were riding bikes for guys like you now (or me then) with a zillion spacers...and that was the majority of the sales so they said, "heck, we can just make bikes for guys like that, and the fast guys can just deal with negative rise stems", because we make more sales if the bikes are more easily fit and comfortable out of the gate.





I know Steve Harad took heat for going from a long and low Airfoil pro to the higher stack Kestrel 4000 and shorter reach....he explained that he was making a bike that was easier for the bulk of his customers to ride, while still being useable by guys who wanted to really go lower with a lower stem.

By the way, I agree with you that there are some fitters not doing the right thing, but since the fitter is not employed by the bike brand, why risk losing sales to bad fitters when yuo can make a bike that can still work with a bad fit. This is good business...taking what is in your control into your control to close the monetary transaction.
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Re: Death of Long and Low Geometry [James Haycraft] [ In reply to ]
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i can maybe add a couple more, as I know 2 folks that are 5-9 with 48cm NP3s now. with 1cm spacers, the 51 would be too tall at +22mm
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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That's what you get when you turn bike fit into a marketing tool instead of the art form it should be. Shops simply don't know how to fit bikes properly, and so manufacturers now build bikes that they can sell instead of what they know is right. Great for me, as all those people need to be re-fit! Finding a bike to fit them...that's another story. When a Trek Speed Concept is considered a long/low bike, you know we've gone in the wrong direction. Felt DA long & low? Really?

It also never ceases to amazing me how people have been conditioned to accept less than optimal positions, or buy into the flexibility or aggressive is less comfortable myths. Flexibility has nothing to do with it, it doesn't take significant adaptation time (if any), lower is almost always more comfortable - you just have to do it right, and you need to do it with a fit bike. And, by the way, if you just put someone in aero and start moving that fit bike around under them without allowing them to re-set themselves, you're doing it wrong. About 72% off all people will not rotate their hips properly if that's how you conduct fits. But, hey, keep doing it! More business for me!

Jim Manton / ERO Sports
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Re: Death of Long and Low Geometry [devashish_paul] [ In reply to ]
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devashish_paul wrote:
Nick B wrote:
Dev, most ppl dont have injuries keeping them from obtaining a faster position.

The problem lies with inappropriate fitters and use of words like "comfort" and "aggressive"


Come back when you are 55 or even 45. Most of those athletes have a variety of limitations.

I rarely find that to be true. We have 70 yr old clients who would put most people's positions on this forum to shame.

Jim Manton / ERO Sports
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Re: Death of Long and Low Geometry [Jim Martin] [ In reply to ]
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sounds like you have your priorities in line with the tires and clothing. just know there are better options, and there are those on this forum that can help you make the decision should it ever come to that.

as for your helmet I was talking about *smaller* like in a size smaller. There are two components to aero drag, simplified, and that is Coefficient of drag and area. I suspect most awesome TT helmets that test well for everyone do so because they're smaller. So, if the Bell (or the similar Giro) test well for you, get the smallest possible size you can get. Same goes for the P09, which seems to test well on every head.

Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting

“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.â€
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Jim@EROsports wrote:
Shops simply don't know how to fit bikes properly

I would agree with that, generally. But there are far more ROAD "shops" than TRI "shops." I think that is an important consideration when considering whether one has the right skillset to fit "properly." (which, in our world, revolves around triathlon).
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Just to provide an example. I personally conduct 10-15 tri-specific fits each week. My other fitters a handful more. Below is a pic of a recent fit which is probably the most common type of athlete we see. I think we can all agree this is not the fittest of athletes, but certainly training hard and wanting to improve. Honestly, she actually came in with a better than average bike shop fit, but not a position she could maintain comfortably for very long (15 minutes at a time). As you can see from the bottom pic, the answer to her comfort was not going higher, it was going longer and lower. The very next day she went out and rode 90 miles and emailed later that afternoon to say it was the most comfortable 90 miles she'd ever experienced on a bike. She rode virtually the entire ride in aero and felt great. YOU JUST HAVE TO DO IT RIGHT! Oh, and by the way, there really aren't a lot of bikes that could fit her in this position - especially off-the-shelf.[/img]

Jim Manton / ERO Sports
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Re: Death of Long and Low Geometry [DarkSpeedWorks] [ In reply to ]
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DarkSpeedWorks wrote:
That is a sweet paint job. When you did the carbon repair and paint, did you consider adding some top tube storage bosses? It's not a hard job for a carbon frame expert.

Greg @ dsw

Calfee did the repair, they were awesome, local guy did the paint, but he does plenty of bike for pros and others around the country (Alan Edwards). I am going to get him to touch it up when it gets back. I beat it up a little bit recently.

I never thought about having them put the bosses on, because I am a moron! That would have been perfect, and exactly where the damn crack in the frame was repaired too! Damn it, why didn't I think of that.

Ironman Certified Coach

Currently accepting limited number of new athletes
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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What was her limiter in the first position? ("limited to 15mins at a time")
Last edited by: James Haycraft: Oct 22, 14 16:36
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Re: Death of Long and Low Geometry [James Haycraft] [ In reply to ]
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James Haycraft wrote:
What was her limiter in the first position? ("limited to 15mins at a time")

The fitter.

Jim Manton / ERO Sports
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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I hereby award you 100 points for a double word score, referring to "flexibility" and "aggressive" as myths, and an additional 100 points for attributing those myths (however tangentially) to idiot fitters.


chappeau!

Jim@EROsports wrote:
That's what you get when you turn bike fit into a marketing tool instead of the art form it should be. Shops simply don't know how to fit bikes properly, and so manufacturers now build bikes that they can sell instead of what they know is right. Great for me, as all those people need to be re-fit! Finding a bike to fit them...that's another story. When a Trek Speed Concept is considered a long/low bike, you know we've gone in the wrong direction. Felt DA long & low? Really?

It also never ceases to amazing me how people have been conditioned to accept less than optimal positions, or buy into the flexibility or aggressive is less comfortable myths. Flexibility has nothing to do with it, it doesn't take significant adaptation time (if any), lower is almost always more comfortable - you just have to do it right, and you need to do it with a fit bike. And, by the way, if you just put someone in aero and start moving that fit bike around under them without allowing them to re-set themselves, you're doing it wrong. About 72% off all people will not rotate their hips properly if that's how you conduct fits. But, hey, keep doing it! More business for me!

Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting

“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.â€
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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You need a giant trinity advanced,
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Jim@EROsports wrote:
devashish_paul wrote:
Nick B wrote:
Dev, most ppl dont have injuries keeping them from obtaining a faster position.

The problem lies with inappropriate fitters and use of words like "comfort" and "aggressive"


Come back when you are 55 or even 45. Most of those athletes have a variety of limitations.


I rarely find that to be true. We have 70 yr old clients who would put most people's positions on this forum to shame.

Gotta agree with Jim here....I am 48 and ride in pretty low / long position w/ no issues, as do most of my training buddies. But we all also have a lot of years in the saddle, which I think goes a long way towards being able to ideal position on your own.

That said, to dev's points above re: the market, I largely agree, but disagree in a few important areas. Back when I was doing product development in the industry, all the product guys seemed to have a built-in bias towards making bikes that *we* wanted to ride. Sure, for a mountain bike, we would shorten the TT up a bit and put a shorter / higher rise stem on, or maybe even *gasp* use a rise bar....but in general, they were mostly bikes that were built around a racers' mentality.

And what our dealers kept telling us (and what we were slow to respond to) was that our customers weren't interested in riding bikes like that. So they were coming in, buying a mountain bike and swapping out for smoother tires, higher rise stems / bars and big fat cushy saddles. In short, we weren't listening to the voice of the consumer. The company I was working for at the time finally took notice and we developed the first "comfort" bike that not only included all the points noted, but we designed a frame around the idea of "comfort"....which from a frame design POV meant a more upright position. I also then used a similar concept to design one of the first "disease ride" bikes.....a style that eventually emerged as the Gran Fondo bikes today.

But the difference was that we didn't abandon the other bike designs.....we augmented our bike lines with the new models, but kept selling the other ones as well. Unfortunately, I don't see that happening as it pertains to tri bikes. The trend right now is undoubtedly towards the bikes with higher stacks and shorter reach, but it is now to the detriment of the long / low bikes. And the reality is that there is still a market for those bikes, and many, many people were able to successfully fit on them. There is the possibility for both designs to co-exist in the market.....but the bike industry is very much one that follows trends hard. And when Specialized had great success with the Shiv Tri geometry, everyone else started running in that direction.....which left a lot of us abandoned.

So while the move to shorter and taller bikes is absolutely correct (gotta listen to the Voice of the Consumer, right?), it does not mean you need to abandon Long & Low. My guess is that as the people who can ride those bikes start to cycle out of their current rides, there is going to be a circling back to bikes that will fit their needs.

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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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I get that, I'm curious as to why she said that (usually associated with some sort of saddle woe - though it looks like she had an Attack to begin with - or discomfort somewhere else).

please note: not arguing with you simply curious. I do what I hope are generally "good" fittings at my shop with the "right" philosophies so am always looking to see what good people are doing.
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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go out and find yourself a vintage Sofride Rocket or Classic Beam bike. Another alternative could be a Falco or a Diamond for you. And then there is also a Griffen or an Elite.
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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IIRC, SuperDave said that they made a custom stem for Rinny….If she wanted to she could have gotten lower on the IA. Maybe he has a spare ;-)

Funny how none of the big companies are offering a modified stem/option, even Cervelo has gone away from the X-low option….I guess as others have said not much of a market.

Having said that I feel your pain, on my P5 (51) I just modified the arm pads so they are about 1 inch further ahead and just learned to live with the steering. Last year I noticed it, this year I just got used to it. The FC on the P5 is about 2cm shorter than your P3-SL which I used to ride.

Maurice
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Re: Death of Long and Low Geometry [James Haycraft] [ In reply to ]
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Yeah, I was just having fun.

Shoulder and neck pain, which made her think she needed to go higher, but it was just the opposite. This is why I don't necessarily agree with listening to the consumer about what they think they want, at least before a fit. Most don't realize, because they've been conditioned to believe in these myths about fit, that what they think is uncomfortable is actually very comfortable. There is nothing more fun for me than dropping the aero bars on the fit bike and watching the client's face as they're shocked at how much more comfortable the position becomes. Favorite part of the fit! Not something you can do without a fit bike - not very well anyway.

Jim Manton / ERO Sports
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Re: Death of Long and Low Geometry [Power13] [ In reply to ]
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Power13 wrote:
Jim@EROsports wrote:
devashish_paul wrote:
Nick B wrote:
Dev, most ppl dont have injuries keeping them from obtaining a faster position.

The problem lies with inappropriate fitters and use of words like "comfort" and "aggressive"


Come back when you are 55 or even 45. Most of those athletes have a variety of limitations.


I rarely find that to be true. We have 70 yr old clients who would put most people's positions on this forum to shame.


Gotta agree with Jim here....I am 48 and ride in pretty low / long position w/ no issues, as do most of my training buddies. But we all also have a lot of years in the saddle, which I think goes a long way towards being able to ideal position on your own.

That said, to dev's points above re: the market, I largely agree, but disagree in a few important areas. Back when I was doing product development in the industry, all the product guys seemed to have a built-in bias towards making bikes that *we* wanted to ride. Sure, for a mountain bike, we would shorten the TT up a bit and put a shorter / higher rise stem on, or maybe even *gasp* use a rise bar....but in general, they were mostly bikes that were built around a racers' mentality.

And what our dealers kept telling us (and what we were slow to respond to) was that our customers weren't interested in riding bikes like that. So they were coming in, buying a mountain bike and swapping out for smoother tires, higher rise stems / bars and big fat cushy saddles. In short, we weren't listening to the voice of the consumer. The company I was working for at the time finally took notice and we developed the first "comfort" bike that not only included all the points noted, but we designed a frame around the idea of "comfort"....which from a frame design POV meant a more upright position. I also then used a similar concept to design one of the first "disease ride" bikes.....a style that eventually emerged as the Gran Fondo bikes today.

But the difference was that we didn't abandon the other bike designs.....we augmented our bike lines with the new models, but kept selling the other ones as well. Unfortunately, I don't see that happening as it pertains to tri bikes. The trend right now is undoubtedly towards the bikes with higher stacks and shorter reach, but it is now to the detriment of the long / low bikes. And the reality is that there is still a market for those bikes, and many, many people were able to successfully fit on them. There is the possibility for both designs to co-exist in the market.....but the bike industry is very much one that follows trends hard. And when Specialized had great success with the Shiv Tri geometry, everyone else started running in that direction.....which left a lot of us abandoned.

So while the move to shorter and taller bikes is absolutely correct (gotta listen to the Voice of the Consumer, right?), it does not mean you need to abandon Long & Low. My guess is that as the people who can ride those bikes start to cycle out of their current rides, there is going to be a circling back to bikes that will fit their needs.

I think the problem is R&D associated with each bike variant and incremental market for a product spin to target a slightly different segment outside the main market. The main market is the back 97% of the triathlon field in 49-59. If you can sell one product to them (different size molds but the same bike), then you're done. Outside that, you have to decide if you want another product to address the slices of the market outside of the fat part of the market (I am talking about TAM, not size the the athletes).

Sure there is a market of riders like Nick B, but you can sell the same P3 you sell to me with no spacers and sell it to guys like him with a negative rise stem...and get gets better...I am the "no spacer guy" on the new P3, so you can sell it to all the guys above me who need 1, 2, 3, 4 spacers. If you make a bike for Nick and make me use 8 spacers, (and I am in the 10 percentile group who don't need spacers) then you can't sell really well to the additional 90% above me who need 1-4 spacers. So why bother making a bike optimized around Nick's needs, when you can address much larger TAM (sorry, you know the acronym....Total Available Market) if it is built around a different 'zero spacer athlete' who is closer to the bulk of the market.

If I was a VP in a bike company I'd tell the tri/TT bike product manager guy, "I am going to give you as small a R&D budget to minimize my R&D spend on this small market and with which you need to address 80-90% of the market...spec out a product that does that, or I am putting that money into Hybrid bike that I can sell to every fitness rec athlete. I want to win the entire latter market because I think we can make more revenue there...all this tri stuff is niche...I'll put money into because it is cool and a nice market to have flagship products in....but only so many $$$.... so come up with something that gets me the biggest bang for my R&D....don't try to worry about niche usages in the market, we'll leave that to small bike companies who can make money servicing those market segments...they are not interesting enough to put incremental R&D into...I'll put my R&D elsewhere....we can only spend so much R&D on the tri market and I really don't want to add another sets of molds to address only 5% or less of the market when I can service that incremental segment with the same investment in the main line product and get maybe half of that anyway".

That's really the main reason why Nick is not getting the bike he wants. I appreciate his frustration because I was exactly like him, mucking around with ergo stems, low stack padding etc etc. Back in the day, if I got an extra small bike and jacked my saddle forward, I'd literally fly over the front, and so I needed to go with a larger frame with decent front center, then jack the saddle forward and take an ergo stem to get low. The problem back in the day with going long and low was there were no long and low bikes...we had to use road bikes that were small to get low, but then there was not enough bike in front of you....so you had to go with a decent size frame and then get the saddle forward with a forward seat post and then low with an ergo stem.

Fortunately long and low tri bikes started coming soon enough later, but athletes who need to do this have generally been the pointy end of the field. Guys who just want to do their first Ironman for the FINISH are 1/3 of every WTC IM. They are not the guys going to Jim at Ero sport for fit and they don't need what Nick B wants (or what I used to want).

Think about this for a second. If every IM has 800 newbie IM's that likely means there are 800 certain sales at each IM. Then there are 1600 more who have bikes and will upgrade. Out of 2400, there are maybe 200 who seriously will get close to Kona of which maybe only 100 need to slam the stem as low as you can go on a new P3 or a Shiv. If you can get low enough for Ben Hoffman or a Craig Alexander or Frodo on a Shiv, then imagine the discussion inside the company, "OK, so I can sell the same bike to the 16 hour finisher as Frodo and they can both do what they need to do in an IM? Sounds like we don't need to invest in another complimentary frame for the guys who need to get even lower."

What would you do if you were the CFO and just looks at R&D spend and ROI and had to look at the NPV on a variety of investments today?

Dev
.
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Jim@EROsports wrote:
Yeah, I was just having fun.

Shoulder and neck pain, which made her think she needed to go higher, but it was just the opposite. This is why I don't necessarily agree with listening to the consumer about what they think they want, at least before a fit. Most don't realize, because they've been conditioned to believe in these myths about fit, that what they think is uncomfortable is actually very comfortable. There is nothing more fun for me than dropping the aero bars on the fit bike and watching the client's face as they're shocked at how much more comfortable the position becomes. Favorite part of the fit! Not something you can do without a fit bike - not very well anyway.

I remember on a ride training for IMC 1995. Right on the side of the road, I stopped my buddy, took out my Allen key and loosened the bolt on his quill stem, slammed the stem down 5 cm and saw that exact expression...moved the saddle forward 4 cm and up a few mm and told him that he was going ride the last 3 hours home whether he liked it or not....he could not believe that it would be possible! He was slammed back in a roadie position with clip ons (as you would expect back then).

Then he says, "It is uncomfortable riding sitting on the hoods in this position" To which I replied, "You don't ride in the hoods, that's just there for when you brake". Every position outside of the aero is just there for turning or stopping or mounting, but no where else.

So I agree with everything you guys are saying, BUT what you guys want does not sell more bikes....at least "not enough bikes"

Dev
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Re: Death of Long and Low Geometry [mauricemaher] [ In reply to ]
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mauricemaher wrote:
IIRC, SuperDave said that they made a custom stem for Rinny….If she wanted to she could have gotten lower on the IA. Maybe he has a spare ;-)

Funny how none of the big companies are offering a modified stem/option, even Cervelo has gone away from the X-low option….I guess as others have said not much of a market.

Having said that I feel your pain, on my P5 (51) I just modified the arm pads so they are about 1 inch further ahead and just learned to live with the steering. Last year I noticed it, this year I just got used to it. The FC on the P5 is about 2cm shorter than your P3-SL which I used to ride.

Maurice

It seems like you have to do what we did back in the day on a road bike when we had to go with larger frames and then get low with an ergo stem to get enough front center for handling. But what options are there to slam a P5 stem low ?
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Re: Death of Long and Low Geometry [devashish_paul] [ In reply to ]
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I agree that manufacturers are building what they can sell, but it's only because bike shops are incapable of selling a proper tri bike because they're incapable of conducting proper tri fits. I've had two manufacturers admit this to me personally, and know of a third who admitted it to AndyF. Shops might have all the latest fit tech, and have attended a 2-3 day fit school, and even another school to pronounce them "Master Fitters" but that does not a fitter make. No one can even begin to fit for ERO unless they go through a 6 month apprenticeship, and have advanced education in some form of exercise science. Only then can they touch one of our clients, and for a year after they're allowed to fit on their own, each of their fit's data is individually evaluated and critiqued.

And, no, the majority of our clients are not at the pointy end of the tri spectrum. The overwhelming majority of our tri clients (74% of our fits are tri-specific) are new to the sport and have either never been in aero before, or they've been in aero for a very short time. Average age is 38-58, and most leave with positions similar to our elites. Oh, and although it's a strange number, 52% of our clients are women, and they, too, achieve aero positions just as easily as men. In fact, I would contend women are able to achieve aero positions more easily than men as long as their saddle is comfortable. Amazingly, many tri-specific saddles become more comfortable as, you guessed it, you get lower!

Jim Manton / ERO Sports
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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...there you have it. Jim is one of the best fitters I've worked with. (Hi Jim! Love ya, man!) There are many more, but they are all bumping up against frame stack constraints.

AndyF
bike geek
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Re: Death of Long and Low Geometry [devashish_paul] [ In reply to ]
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No options really except to get a size smaller and deal with the steering issues, or to get an aftermarket stem/bar combo, which sort of defeats the purpose of buying a (integrated) "super bike" in the first place place.

Also BB's are lower now by 1-2cm, which affects stack or at least changes how high the front vs seat height is. Not sure how much of the short/high trend is lower BB or higher head tube.

*Edit: Also for some Crank length is less….. and actually I have seen on a few brands where spec is about 5mm lower so very rare to find a bike even in the largest size which has a 175, maybe the reason for lower BB in some brands.

I'm pretty sympathetic to Nick but I think I'm in the minority.

Maurice
Last edited by: mauricemaher: Oct 22, 14 18:50
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Jim@EROsports wrote:
I agree that manufacturers are building what they can sell, but it's only because bike shops are incapable of selling a proper tri bike because they're incapable of conducting proper tri fits. I've had two manufacturers admit this to me personally, and know of a third who admitted it to AndyF. Shops might have all the latest fit tech, and have attended a 2-3 day fit school, and even another school to pronounce them "Master Fitters" but that does not a fitter make. No one can even begin to fit for ERO unless they go through a 6 month apprenticeship, and have advanced education in some form of exercise science. Only then can they touch one of our clients, and for a year after they're allowed to fit on their own, each of their fit's data is individually evaluated and critiqued.

And, no, the majority of our clients are not at the pointy end of the tri spectrum. The overwhelming majority of our tri clients (74% of our fits are tri-specific) are new to the sport and have either never been in aero before, or they've been in aero for a very short time. Average age is 38-58, and most leave with positions similar to our elites. Oh, and although it's a strange number, 52% of our clients are women, and they, too, achieve aero positions just as easily as men. In fact, I would contend women are able to achieve aero positions more easily than men as long as their saddle is comfortable. Amazingly, many tri-specific saddles become more comfortable as, you guessed it, you get lower!

Thanks Jim...and the stats are interesting. Keep in mind that the core business of bike companies is to just sell bikes, and secondary is to sell bikes that fit well. For bike shops, the first thing is to sell the bike, second is that the customer is comfortable so they had a good use experience and the third is that they are going fast and aero optimized. So you can see where a pro fit like what you would offer would be a tertiary element of their sell cycle. If you are selling aerodynamics and fit, that IS the business.
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Re: Death of Long and Low Geometry [mauricemaher] [ In reply to ]
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mauricemaher wrote:
IIRC, SuperDave said that they made a custom stem for Rinny….If she wanted to she could have gotten lower on the IA. Maybe he has a spare ;-)
Maurice

When I asked bout this option, I was told I could do it, but I would be slower for it (SuperDave said this). The conversion stems will be available at some point I believe.

Ironman Certified Coach

Currently accepting limited number of new athletes
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Jim@EROsports wrote:
Shops might have all the latest fit tech, and have attended a 2-3 day fit school, and even another school to pronounce them "Master Fitters" but that does not a fitter make. No one can even begin to fit for ERO unless they go through a 6 month apprenticeship, and have advanced education in some form of exercise science. Only then can they touch one of our clients, and for a year after they're allowed to fit on their own, each of their fit's data is individually evaluated and critiqued.

I have to commend you for this. Logic, paddling upstream in the face of "Sales First". What a concept.


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Re: Death of Long and Low Geometry [mauricemaher] [ In reply to ]
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By the way, I am sympathetic what you, Nick and others are asking for from an athlete perspective. I am just trying to explain why they may not getting what they want from a business perspective. Every day in my professional life, I have to leave customers unserviced for THEIR needs, because the segment they represent does not warrant my executives giving more R&D dollars to service them. It is not optimal for them and I don't like that I can't address their needs, but I'm stuck developing stuff what will make our investors happy. Less R&D spend, more revenue is what the boss (NASDAQ) wants us to do....and when I buy stock in some company, I want them to spend zero dollars on R&D, have everyone working 18 hours per day, not seeing their families, and maximizing revenue. 6-9 months later, I will run with my stock upside and find another company to put my money in. That's being extreme, but in an imperfect world, this is the extreme end of the trend. Somewhere in between is reality where there is some R&D spend, but some market segments end up being under serviced because of product portfolios not being large enough to address all ends of the market.
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Re: Death of Long and Low Geometry [devashish_paul] [ In reply to ]
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Lot there to respond to...not certain I have the energy tonight. Wink

But, a couple of quick points:

* I think we just disagree with the size of the market for people who could / would ride a long / low bike. And as more people figure out that their short / tall bikes aren't really what works best for them, I expect this number to rise. This will e further exacerbated by rivers in older bikes looking for new ones with similar geos.

* the bike biz has rarely shied away from SKU proliferation. It is, IMO, the biggest issue robbing it of profitability. PM's are convinced that they need this niche and that. But tri bikes are a category that is showing growth. I feel pretty confident saying that a line of L&L bikes would sell better than other lines currently being manufactured. Hell, look how many variants of 'cross bikes there are now that discs have hit big. How about the 16 different sizes of MTB wheel bikes do they need? 26", 29'ers, 650b, etc. nobody has any problem investing the R&D for those niches.

Now, it has been a while since I was in the bike biz, but I would wager a guess that the biggest obstacle to more bikes for tri is the industry itself and the traditional mental block re: "tri geeks". That is changing, but clearly still there since so many companies insist on still developing bikes that are UCI legal but marketing them as tri bikes.

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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Nick B wrote:
There's been a convergence in the bike industry to Trek's middle of the road geometry. I can't say I blame the industry for moving towards that direction, but I believe the trend is preventing us from achieving faster, more aero positions.

My position, which doesn't seem extreme by any means, cannot be replicated on a single super bike due to the lack of reach, excess stack, and lack of extension tilt.



My only option for a faster frame is picking up a used P4, which is still a bit of compromise with the rear braking and wheel with limitations.

How do you guys feel about bike geometry? What would you like to see in the future?

2 quick comments:

First, what crank length do you run? Going significantly shorter may help alleviate your stack issue.

Second, with as far forward as you sit, have you explored moving your bars forward and up a bit (i.e. superman-ish) to be slightly less "hunched" and possibly allow your pelvis to tilt forward better?

That bike just looks way too small for you...

BTW, that's a Scott 100K bar right? Nice. :-)

http://bikeblather.blogspot.com/
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Re: Death of Long and Low Geometry [Jim Martin] [ In reply to ]
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Jim Martin wrote:
mauricemaher wrote:
IIRC, SuperDave said that they made a custom stem for Rinny….If she wanted to she could have gotten lower on the IA. Maybe he has a spare ;-)
Maurice


When I asked bout this option, I was told I could do it, but I would be slower for it (SuperDave said this). The conversion stems will be available at some point I believe.

The custom stem for rinny is not for her to get lower, but for her to use the profile aerobars (her sponsor). I think the felt bar and stem would allow her to get the same pad stack (or maybe lower) and I would guess the felt bars are faster.
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Re: Death of Long and Low Geometry [chaparral] [ In reply to ]
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chaparral wrote:
The custom stem for rinny is not for her to get lower, but for her to use the profile aerobars (her sponsor). I think the felt bar and stem would allow her to get the same pad stack (or maybe lower) and I would guess the felt bars are faster.

I got the chance to really look closely at her 2013 ride. I know she is using the custom stem because she needs to ride profile bars. Nontheless, it appears as if the CL of her stem at bars is lower than the lowest setting for the integrated bars.

In addition, being able to use different bars, not stock IA ones and not Rinny's PD bars would present additional options, maybe lower ones.

Finally, it may be possible that instead of a custom stem, they allow normal stems to attach to the stock steerer via an adapter of sorts, again giving more options and potentially even a negative stem.

Last but not least, Dave confirmed that you can get lower using the custom stem, he is of the opinion that it would be slower though (due to losing the integration).

Ironman Certified Coach

Currently accepting limited number of new athletes
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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jim,

can you recommend a good fitter in the northeast. mass, nh, maine, ri in particular?

john
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Nick B wrote:
There's been a convergence in the bike industry to Trek's middle of the road geometry. I can't say I blame the industry for moving towards that direction, but I believe the trend is preventing us from achieving faster, more aero positions.

My position, which doesn't seem extreme by any means, cannot be replicated on a single super bike due to the lack of reach, excess stack, and lack of extension tilt.



My only option for a faster frame is picking up a used P4, which is still a bit of compromise with the rear braking and wheel with limitations.

How do you guys feel about bike geometry? What would you like to see in the future?

Looks like a 51cm IA would fit the front end stack based solely on the pad/front wheel relationship.
I'd also consider your position to be too low for a lowest possible drag perspective from my W.A.G. experience.

And...
Eat a cheeseburger.

-SD
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
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AndyF wrote:
This is best post I've ever seen on Slowtwitch in a long time! It's way up there with stuff that Josh Poertner posts and Slowman's posts on bike fitting. Mark this one down, folks, and read Nick B's post very carefully.

Frame stack is getting taller, which means that there's very little left to fit fast, low riders. Worse still, frame stack eats away at other ways to attain the same rider stack. I'd rather use aero armpad spacers, for example, than let an ugly non-aero head tube take up the stack. Tall head tubes are getting in the way of aerodynamics.

Well said, Nick B!

The head tube is the "fastest" member of some of our aero bicycles. You want more of it, not less.
Aerobar risers are typically bad unless you use LOTS of them and let the base bar fly in the clean air without arm/extension interference.

-SD

https://www.kickstarter.com/...bike-for-the-new-era
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Jim@EROsports wrote:
That's what you get when you turn bike fit into a marketing tool instead of the art form it should be. Shops simply don't know how to fit bikes properly, and so manufacturers now build bikes that they can sell instead of what they know is right. Great for me, as all those people need to be re-fit! Finding a bike to fit them...that's another story. When a Trek Speed Concept is considered a long/low bike, you know we've gone in the wrong direction. Felt DA long & low? Really?

It also never ceases to amazing me how people have been conditioned to accept less than optimal positions, or buy into the flexibility or aggressive is less comfortable myths. Flexibility has nothing to do with it, it doesn't take significant adaptation time (if any), lower is almost always more comfortable - you just have to do it right, and you need to do it with a fit bike. And, by the way, if you just put someone in aero and start moving that fit bike around under them without allowing them to re-set themselves, you're doing it wrong. About 72% off all people will not rotate their hips properly if that's how you conduct fits. But, hey, keep doing it! More business for me!

With the exception of the two largest sizes a stock DA can get the brake levers below the top of the front tire with the lowest 0mm rise flat stem option.
I'm not sure how low you'd need a DA to get but at some point the riders head is going to hit the front wheel.

-SD

https://www.kickstarter.com/...bike-for-the-new-era
Quote Reply
Re: Death of Long and Low Geometry [mauricemaher] [ In reply to ]
Quote | Reply
mauricemaher wrote:
IIRC, SuperDave said that they made a custom stem for Rinny….If she wanted to she could have gotten lower on the IA. Maybe he has a spare ;-)
Funny how none of the big companies are offering a modified stem/option, even Cervelo has gone away from the X-low option….I guess as others have said not much of a market.
Having said that I feel your pain, on my P5 (51) I just modified the arm pads so they are about 1 inch further ahead and just learned to live with the steering. Last year I noticed it, this year I just got used to it. The FC on the P5 is about 2cm shorter than your P3-SL which I used to ride.

Maurice

The stem Rinny used was so she could keep her Profile bar, not so she could get lower. This 31.8mm adapter stem is available from your Felt dealer if you want to de-integrate your IA front end.

-SD

https://www.kickstarter.com/...bike-for-the-new-era
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Re: Death of Long and Low Geometry [Jim Martin] [ In reply to ]
Quote | Reply
Jim Martin wrote:
mauricemaher wrote:
IIRC, SuperDave said that they made a custom stem for Rinny….If she wanted to she could have gotten lower on the IA. Maybe he has a spare ;-)
Maurice
When I asked bout this option, I was told I could do it, but I would be slower for it (SuperDave said this). The conversion stems will be available at some point I believe.

You'd be slower with Rinny's bar.

It may be possible that an aero-or-die basebarless set up is faster than the stock IA Dagger bar/stem. Truthfully we haven't tested it but convention suggests ~8s/40km improvement if my poor math is correct.

-SD

https://www.kickstarter.com/...bike-for-the-new-era
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
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AndyF wrote:
Someone needs to make extremely tall, safe aero-profiles armpad spacers. I'd rather have those than a big honking head-tube.
.

All Felt's TT/Tri bikes with the exception of the Bayonet-less S32, B16, and B14 models use M6 hardware and up to 65mm risers that are thru-bolted top and bottom and include two fixed width bridges and an adjustable width bridge. These clip-on extensions and arm rests can be mounted to just about any non-integrated base bar.

Properly configured, the risers are stiffer than the same amount of exposed carbon steerer and spacers and far more aero.

-SD

https://www.kickstarter.com/...bike-for-the-new-era
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
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Awesome. I just looked on the Felt web site and don't see it for sale. Can you point me to it? I have a bunch of clients who purchased DA's who can't get low enough on their bikes but would like to. I've used flat stems taken off Kristen Armstrong's bike and maybe, just maybe, one "borrowed" from Millars bike in the lobby, but otherwise haven't seen them for sale.

Jim Manton / ERO Sports
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:
AndyF wrote:

Someone needs to make extremely tall, safe aero-profiles armpad spacers. I'd rather have those than a big honking head-tube.
.


All Felt's TT/Tri bikes with the exception of the Bayonet-less S32, B16, and B14 models use M6 hardware and up to 65mm risers that are thru-bolted top and bottom and include two fixed width bridges and an adjustable width bridge. These clip-on extensions and arm rests can be mounted to just about any non-integrated base bar.

Properly configured, the risers are stiffer than the same amount of exposed carbon steerer and spacers and far more aero.

-SD

Great, great aero bar. One of my favorites, for sure.

Jim Manton / ERO Sports
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Jim@EROsports wrote:
Awesome. I just looked on the Felt web site and don't see it for sale. Can you point me to it? I have a bunch of clients who purchased DA's who can't get low enough on their bikes but would like to. I've used flat stems taken off Kristen Armstrong's bike and maybe, just maybe, one "borrowed" from Millars bike in the lobby, but otherwise haven't seen them for sale.

Referenced with these inventory numbers:

980100 - Stem Bayonet 3 Fixed Position 90mm x 0
980102 - Stem Bayonet 3 Fixed Position 110mm x 0

You can use the Felt webstore on the internet and select the triathlon parts and click the stem option here:

http://www.feltbicycles.com/...ed-Postion-Stem.aspx

Next select your size and click BUY.

-SD


https://www.kickstarter.com/...bike-for-the-new-era
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Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
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That's fantastic! Love it!

Jim Manton / ERO Sports
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Re: Death of Long and Low Geometry [mortysct] [ In reply to ]
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Quote:
Ayyyeeee mane nice dreads keepin it OG. But yea I'd peep the bmc, bianchi, and possibly the look
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Re: Death of Long and Low Geometry [ericM40-44] [ In reply to ]
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ericM40-44 wrote:
I don't think the word "aggressive" means what you think it means. There is nothing aggressive about what he's doing there. He's just sitting there. Passively even.

if you ever do become one, or even visit one, please please don't use nor encourage the use of the word "aggressive"

It probably doesn't. Since this isn't my native tongue, there will be the occasional misunderstanding - around here, the literal translation of the word "Aggressive" is used as the opposite of "Conservative", with conservative being used to describe the usual "Hail Mary" position you get from your shop "fitter" when a beginning rider complains of a back-ache. What, then, would be the right word to describe a position with the shoulders about level with the hips?

ZONE3 - We Last Longer
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:
Jim Martin wrote:
mauricemaher wrote:
IIRC, SuperDave said that they made a custom stem for Rinny….If she wanted to she could have gotten lower on the IA. Maybe he has a spare ;-)
Maurice
When I asked bout this option, I was told I could do it, but I would be slower for it (SuperDave said this). The conversion stems will be available at some point I believe.

You'd be slower with Rinny's bar.

It may be possible that an aero-or-die basebarless set up is faster than the stock IA Dagger bar/stem. Truthfully we haven't tested it but convention suggests ~8s/40km improvement if my poor math is correct.

-SD

Thanks Dave, I appreciate the response. By the way, I also have no intention of testing a basebar-less configuration!

Ironman Certified Coach

Currently accepting limited number of new athletes
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Jim@EROsports wrote:
There is nothing more fun for me than dropping the aero bars on the fit bike and watching the client's face as they're shocked at how much more comfortable the position becomes. Favorite part of the fit! Not something you can do without a fit bike - not very well anyway.

Agree on this (and everything else you've said in the thread) - getting to the end of the fit and they're looking at the resulting position and struggling to comprehend that they were so comfortable with such a 'racy' looking position. I've never done a tri fit where we weren't able to go lower in the process of getting comfortable.

Or the relief on the face of someone who has been wondering "how will I get through an IM on a bike that feels this bad" on discovering that the aerobars are actually a very relaxed place to be.
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Re: Death of Long and Low Geometry [cyclenutnz] [ In reply to ]
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cyclenutnz wrote:
Jim@EROsports wrote:
the aerobars are actually a very relaxed place to be.

the upside down lazy boy I call it, when I do my bike fits.

Eric Reid AeroFit | Instagram Portfolio
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Re: Death of Long and Low Geometry [tessartype] [ In reply to ]
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listen to what the smart people on this thread are saying... Jim@ERO, AndyF, CycleNutNZ, SuperDave... they don't call it anything... they just call it the output of a competent fit process.

right/wrong, fast/slow, I *might* allow these terms. Still reductionist over simplifications and muddying the water so to speak.

A bike fit should be *just so*

tessartype wrote:
ericM40-44 wrote:
I don't think the word "aggressive" means what you think it means. There is nothing aggressive about what he's doing there. He's just sitting there. Passively even.

if you ever do become one, or even visit one, please please don't use nor encourage the use of the word "aggressive"


It probably doesn't. Since this isn't my native tongue, there will be the occasional misunderstanding - around here, the literal translation of the word "Aggressive" is used as the opposite of "Conservative", with conservative being used to describe the usual "Hail Mary" position you get from your shop "fitter" when a beginning rider complains of a back-ache. What, then, would be the right word to describe a position with the shoulders about level with the hips?

Eric Reid AeroFit | Instagram Portfolio
Aerodynamic Retul Bike Fitting

“You are experiencing the criminal coverup of a foreign backed fascist hostile takeover of a mafia shakedown of an authoritarian religious slow motion coup. Persuade people to vote for Democracy.â€
Quote Reply
Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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Great thread. The real culprit behind the demise of the long / low tri bikes is the old saw about "buy the bike that fits you." Salespeople use small differences in geometry between different brands as a sales tool, even though those small differences usually do not mean much in the real world. With most fitters specing short/tall fits, moving your geometry in that direction gives the fitters a reason to sell your brand over the competition as part of the fitting process.

I'm 61 years old and I ride with more drop than most younger folks I see out there and based on the yo-yo effect that happens in hilly terrain I'm more aero than most of them as well. I currently have a 17 degree stem slammed on my medium SC7 and am looking to get a bit lower, so have been using my meager math skills to figure out how much additional drop various negative rise stems would give me. There have been a few mentions of negative rise stems without putting any numbers on the effect this has on stack, so thought I'd contribute some numbers that might be of value to those of us running conventional stems. I'm sure the fitters on this thread already know this stuff.

Ritchey sells a wide variety of high quality stem configurations, so I'm going to use their stems as an example. In addition to the usual 6/84 degree stems, they also sell 17, 25, and 30 degree stems. They also sell an adjustable stem that goes down to 32 degrees. I used to have the adjustable stem and it is very solid, but it is a bit fussy to switch angles so not something to get thinking you'll do quick height adjustments for field testing.

In a 100 mm length, compared with a standard 6 degree stem, the following angles lower your stack by this much when flipped to the low position:
17 degrees: -19 mm (this gives you a level stem, the rest of the options give you negative rise)
25 degrees: -32mm
30 degrees: -39mm
32 degrees: -42mm
(numbers are rounded to the nearest mm)

Hope this might be helpful to someone out there.
Quote Reply
Re: Death of Long and Low Geometry [tttiltheend] [ In reply to ]
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Re: Death of Long and Low Geometry [michael_runs] [ In reply to ]
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Cool, thanks for the link, that's much easier than my spreadsheet.
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Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
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AndyF wrote:
This is best post I've ever seen on Slowtwitch in a long time! It's way up there with stuff that Josh Poertner posts and Slowman's posts on bike fitting. Mark this one down, folks, and read Nick B's post very carefully.

Agreed. Learning a lot in this one. So I went looking for this other stuff you mention, but did not find any. Can you help and point me in the right direction?

Thanks!

Sr. Salitre
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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[url mailto:Jim@EROsports]It wrote:
Jim@EROsports]It[/url] also never ceases to amazing me how people have been conditioned to accept less than optimal positions, or buy into the flexibility or aggressive is less comfortable myths.

Most consumers really don't know better. I agree with everything you're saying, but how do you suggest filling the knowledge gap for the average triathlete so they can be more discerning and demanding for quality fits? Even as a fairly seasoned triathlete, I have no clue how optimal my fit is or if the guy who's done my fits the past 4-5 years is any good. He's very popular, a great guy, has all the expensive fit tools, certifications, etc., but none of that speaks to whether the fits are worth a damn.

As much as I'd love to get a fit done by you or another highly regarded fitter, travelling just for that is prohibitive. Conversely, as much as I'm sure you'd love the increase in business, there are too many people needing fits for all of them to funnel through the few select leaders in the field.



-Andrew
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:
Properly configured, the risers are stiffer than the same amount of exposed carbon steerer and spacers and far more aero.
-SD

That's what I was saying, and what Jim Manton was getting at. We'd rather trade head tube for aero risers. Can you make risers that go to 200mm? Please?! :-)

AndyF
bike geek
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
Quote | Reply
Well hold up!
Head tube can be very aero.
Exposed steerer with round spacers is what is not aero.

But that does still create opportunities to serve both the high and low positioned athlete, by using less stack in the frame and aero risers for people who need to be high.

You could even produce base bars that angle UP for those people.

Or aero spacers

hell the P5 is kinda all set to go there, with aero spacers AND that high rise option on the aduro.

just lower the stack!


AndyF wrote:
That's what I was saying, and what Jim Manton was getting at. We'd rather trade head tube for aero risers. Can you make risers that go to 200mm? Please?! :-)



Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter
Quote Reply
Re: Death of Long and Low Geometry [jackmott] [ In reply to ]
Quote | Reply
jackmott wrote:
Well hold up!
Head tube can be very aero.
[/quote/

You will never get anything on a bike more aero than a pure NACA profile. These have 1/10th the drag of cylindrical shapes and have been the subject of over 100 years of engineering research. If anything is, that is the perfect shape for aero. Head tubes have the additional role of structurally interfacing the top and down tubes. That compromise makes all the difference. I want stack made up of aero risers, rather than anything else.

Quote:
Exposed steerer with round spacers is what is not aero.

But that does still create opportunities to serve both the high and low positioned athlete, by using less stack in the frame and aero risers for people who need to be high.

Exactly!

AndyF
bike geek
Quote Reply
Re: Death of Long and Low Geometry [jackmott] [ In reply to ]
Quote | Reply
jackmott wrote:
just lower the stack!

Yep, you can always go up with aero risers and lose nothing. You cannot however always go down. I agree 100%, if P5 has geometry of P4 (or close to it), I am already on it. I guess the market is telling them that the one bike they would sell to me and Nick B is nothing compared to the hundreds they sell to people riding high up front (even though those people could fit just fine on "low" P5 with a different bar configuration).

Ironman Certified Coach

Currently accepting limited number of new athletes
Quote Reply
Re: Death of Long and Low Geometry [Jim Martin] [ In reply to ]
Quote | Reply
Here is a reason to do it - now that the market is all high, you can differentiate by being low!

Jim Martin wrote:
jackmott wrote:
just lower the stack!

Yep, you can always go up with aero risers and lose nothing. You cannot however always go down. I agree 100%, if P5 has geometry of P4 (or close to it), I am already on it. I guess the market is telling them that the one bike they would sell to me and Nick B is nothing compared to the hundreds they sell to people riding high up front (even though those people could fit just fine on "low" P5 with a different bar configuration).



Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter
Quote Reply
Re: Death of Long and Low Geometry [tttiltheend] [ In reply to ]
Quote | Reply
tttiltheend wrote:
Great thread. The real culprit behind the demise of the long / low tri bikes is the old saw about "buy the bike that fits you." Salespeople use small differences in geometry between different brands as a sales tool, even though those small differences usually do not mean much in the real world. With most fitters specing short/tall fits, moving your geometry in that direction gives the fitters a reason to sell your brand over the competition as part of the fitting process.
interesting thread indeed!
as one with long legs and a short torso i'm all for the short and high geometry but i can certainly see how i could be accommodated on a longer/lower bike but its difficult to go the other way around.
i see a bit of conflict in the statement that the geometry differences are small and the whole point of this thread that the differences are significant enough that long and low people are struggling to find a good fit - certainly the differences are generally not huge but clearly they can make a difference. if you are reasonably "normal" then most frames can give a good fit but some will still be more natural than others - less spacers etc so probably more aero. if you are at an extreme then there will be a limited selection of practical frames

what would be useful would be a summary of the relative geometry of some of the most popular frames. looking myself, i have noted that the trek SC seems to match my proportions very well (650 stack, 455 reach), cervelo P5 is too long for me, specialized shiv is a bit long so would need to size down from usual but the high stack means that works ok.
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
Quote | Reply
AndyF wrote:
SuperDave wrote:

Properly configured, the risers are stiffer than the same amount of exposed carbon steerer and spacers and far more aero.
-SD


That's what I was saying, and what Jim Manton was getting at. We'd rather trade head tube for aero risers. Can you make risers that go to 200mm? Please?! :-)

I think you said head tube.

zero drag < Felt aero head tube < some aerobar riser configurations < round headset spacers and steerer < parachute

-sD

https://www.kickstarter.com/...bike-for-the-new-era
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:
AndyF wrote:
SuperDave wrote:

Properly configured, the risers are stiffer than the same amount of exposed carbon steerer and spacers and far more aero.
-SD


That's what I was saying, and what Jim Manton was getting at. We'd rather trade head tube for aero risers. Can you make risers that go to 200mm? Please?! :-)


I think you said head tube.

zero drag < Felt aero head tube < some aerobar riser configurations < round headset spacers and steerer < parachute

-sD

Proper position = more aero than any frame set.

Jim Manton / ERO Sports
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:

I think you said head tube.

zero drag < Felt aero head tube < some aerobar riser configurations < round headset spacers and steerer < parachute

-sD


Ok, it's going to take some time for me to wrap my head around the Felt aero head tube concept, then.

Are you saying that 111mm of 3cm diameter head tube has less drag than 111mm of 2 NACA0030 (or NACA0012 for non-UCI) aero risers? Is there any public data on this?

AndyF
bike geek
Last edited by: AndyF: Oct 23, 14 14:00
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
Quote | Reply
The Cervelo P5 white paper has some mention of finding that going wider on the head tube got more aero with the Zabriskie Mannequin aboard.

AndyF wrote:
Ok, it's going to take some time for me to wrap my head around the Felt aero head tube concept, then.

Are you saying that 111mm of 3cm diameter head tube has less drag than 111mm of 2 NACA0030 (or NACA0012 for ironman) aero risers? Is there any public data on this?



Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
Quote | Reply
Jim@EROsports wrote:
Proper position = more aero than any frame set.

Additionally - I sometimes find that having to use low stack bars precludes the use of a BTA (if the rider also has narrow elbow position). Not having the BTA may force bottle on to the frame which wipes out a lot of frame design gains. Would rather have low stack frame and ability to use bars (not that there are many good bars) to accommodate rider specifics taking both position and fuel carrying into account.
Quote Reply
Re: Death of Long and Low Geometry [jackmott] [ In reply to ]
Quote | Reply
Bingo.

Since Superdave is awesome and responds to this thread (notice no other manufacturer of bikes is responding but certainly watching), let's use the old B-Series geometry as an example. When you combined the old geometry with a low-stack Devox bar, well, even I have to admit that combination was a pretty long/low for most people. But hey, that B-16 with the high-stack aero bar, and basically two top caps (low and high were included, which is also pretty awesome of Felt by the way)...now that was a bike I could fit to almost anyone (and did). Would I sometimes need a low-stack aero bar for that bike? Sure, sometimes, but that would then be the outlier.

Unfortunately, manufacturers have now raised the stack of their frames AND combined that with high-stack aero bars. That was just too much. Properly fit, these bikes fit the outliers, the rest just simply can't get low or long enough. Give me the old geometry (B-Series or Cervelo P-Series) with a Bayonet III bar - I'm in fit heaven. If you need higher, I'll pedestal them up to get them there, no problem (most bars are more aero when pedestaled anyway).

Again, the problem is not with the manufacturers; they are simply producing bikes they can sell. The reason they need to build them higher is where the problem lies, and that's with the bike shops who fit these bikes. Bad bike fit is to blame. Turning bike fit into a marketing and sales tool, that's the problem. If good fits were being conducted, and demand for lower-stack bikes rose, manufacturers would happily build them. Simple.

Jim Manton / ERO Sports
Quote Reply
Re: Death of Long and Low Geometry [tttiltheend] [ In reply to ]
Quote | Reply
tttiltheend wrote:
Great thread. The real culprit behind the demise of the long / low tri bikes is the old saw about "buy the bike that fits you." Salespeople use small differences in geometry between different brands as a sales tool, even though those small differences usually do not mean much in the real world. With most fitters specing short/tall fits, moving your geometry in that direction gives the fitters a reason to sell your brand over the competition as part of the fitting process.

I'm 61 years old and I ride with more drop than most younger folks I see out there and based on the yo-yo effect that happens in hilly terrain I'm more aero than most of them as well. I currently have a 17 degree stem slammed on my medium SC7 and am looking to get a bit lower, so have been using my meager math skills to figure out how much additional drop various negative rise stems would give me. There have been a few mentions of negative rise stems without putting any numbers on the effect this has on stack, so thought I'd contribute some numbers that might be of value to those of us running conventional stems. I'm sure the fitters on this thread already know this stuff.

Ritchey sells a wide variety of high quality stem configurations, so I'm going to use their stems as an example. In addition to the usual 6/84 degree stems, they also sell 17, 25, and 30 degree stems. They also sell an adjustable stem that goes down to 32 degrees. I used to have the adjustable stem and it is very solid, but it is a bit fussy to switch angles so not something to get thinking you'll do quick height adjustments for field testing.

In a 100 mm length, compared with a standard 6 degree stem, the following angles lower your stack by this much when flipped to the low position:
17 degrees: -19 mm (this gives you a level stem, the rest of the options give you negative rise)
25 degrees: -32mm
30 degrees: -39mm
32 degrees: -42mm
(numbers are rounded to the nearest mm)

Hope this might be helpful to someone out there.

I hear you. I want to get lower on my SC7... already at -25 degree and eeing a -35 stem. A Small frame would require a longer stem than I'd prefer. The longer the stem, the more weight over the front wheel and you handling get a little wonky and you lose more braking performance.


TrainingBible Coaching
http://www.trainingbible.com
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
Quote | Reply
Jim@EROsports wrote:
Bingo.
Since Superdave is awesome and responds to this thread...


Yes, I totally agree. Thank you, SuperDave, for sharing your knowledge. It might get challenged, but it is very much appreciated!

AndyF
bike geek
Last edited by: AndyF: Oct 23, 14 14:14
Quote Reply
Re: Death of Long and Low Geometry [Jim Martin] [ In reply to ]
Quote | Reply
Jim Martin wrote:
jackmott wrote:
just lower the stack!

Yep, you can always go up with aero risers and lose nothing. You cannot however always go down. I agree 100%, if P5 has geometry of P4 (or close to it), I am already on it. I guess the market is telling them that the one bike they would sell to me and Nick B is nothing compared to the hundreds they sell to people riding high up front (even though those people could fit just fine on "low" P5 with a different bar configuration).

I wouldn't say you lose nothing by pedastaling armrests, you keep a very low base bar position. Also, you make it so that consumers need to pic a certain style of aerobar. There is also the whole aesthetics thing, which is important to lots of people(have you ever seen a nosecone shiv setup really high...shudder)

You imply that anyone who isn't slammed on a p4 is a parachute. Many of us have proportions which allow us to ride very complimentary basebar and aerobar positions on normal stems on middle stack bikes with a flat back and turtled head. Ever seen Rapp on his tall/narrow shiv?
Quote Reply
Re: Death of Long and Low Geometry [Runless] [ In reply to ]
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The point is that pretty much all the bikes fit the same. The only difference is aerodynamics and price. How many more bikes with the same characteristics do you need on the market?

Rapp has really long legs and barely fits on Shiv. He is one of very few people I've ever seen who has a decent fit on a Shiv. You're using one example to represent many.

How about you post your pic and drag numbers?
Last edited by: Nick B: Oct 23, 14 14:37
Quote Reply
Re: Death of Long and Low Geometry [Jim Martin] [ In reply to ]
Quote | Reply
Jim Martin wrote:
jackmott wrote:
just lower the stack!


Yep, you can always go up with aero risers and lose nothing. You cannot however always go down. I agree 100%, if P5 has geometry of P4 (or close to it), I am already on it. I guess the market is telling them that the one bike they would sell to me and Nick B is nothing compared to the hundreds they sell to people riding high up front (even though those people could fit just fine on "low" P5 with a different bar configuration).

They would sell another bike to me if they made long and low. My profile pic shows me in my very comfortable long and low position and although I've not done the wind tunnel or Chung'd I am confident that it's pretty fast. Because I haven't been able to find long and low to facilitate my 51.0 cm stack and 48.0 reach, I haven't upgraded my 51 cm P3C. I use a 135mm -35 degree stem to get my pads that low and the USE Tula bars have the pads as low as I can get them. As others have mentioned I've looked for a P4 and also have some interest in the Norcom Straight, 48cm NP3, Giant Trinity, and Felt DA with 0 rise stem but I think that is what we I am limited to at this time. I agree with others who have argued that it is hard to justify spending money to replace the P3C when the gains would be marginal at best. At this point I am waiting to see what Giant does with their new TT frame.


Regards.
Quote Reply
Re: Death of Long and Low Geometry [jackmott] [ In reply to ]
Quote | Reply
jackmott wrote:
Well hold up!
Head tube can be very aero.
Exposed steerer with round spacers is what is not aero.
But that does still create opportunities to serve both the high and low positioned athlete, by using less stack in the frame and aero risers for people who need to be high.
You could even produce base bars that angle UP for those people.
Or aero spacers
AndyF wrote:

That's what I was saying, and what Jim Manton was getting at. We'd rather trade head tube for aero risers. Can you make risers that go to 200mm? Please?! :-)

Jack,

This is exactly how the DA is configured. The Bayonet handlebars are flippable. The low downward sloping position is for a lower "drops" hand position on the brake levers and the high position is intended to replicate the "hoods" position for the brake levers. The bar is symmetric so it offers two hand positions in one bar. It's also modular in construction so we've configured it so it can be made in widths as narrow as 30mm or as wide as 48cm. It has even been reconfigured with "drops" like a road bar for use on the track w/o brake levers.

But in the case of low-head tube, thin arm rest/extension risers you are only looking at ways to reduce frontal area specifically but these efforts do not increase lift at yaw typically. You need a sail or surface area to get lift and minimizing said surface area has marginal benefits for high-yaw condition rides/athletes i.e. most triathloners.

-SD

https://www.kickstarter.com/...bike-for-the-new-era
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
Quote | Reply
AndyF wrote:
SuperDave wrote:

I think you said head tube.

zero drag < Felt aero head tube < some aerobar riser configurations < round headset spacers and steerer < parachute

-sD


Ok, it's going to take some time for me to wrap my head around the Felt aero head tube concept, then.

Are you saying that 111mm of 3cm diameter head tube has less drag than 111mm of 2 NACA0030 (or NACA0012 for non-UCI) aero risers? Is there any public data on this?

the head tube is the part of the frame that the fork steering axis passes through. I think you are thinking of steer (steerer) tube.
(28.6mm O.D. convention)

The head tube on the IA is not round and closer to 200mm at its widest point, not 30mm.
Look for a link to the patent applications. I don't think we're openly sharing this data; in fact, I think we're protecting it.

-SD

https://www.kickstarter.com/...bike-for-the-new-era
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:
the head tube is the part of the frame that the fork steering axis passes through. I think you are thinking of steer (steerer) tube.
(28.6mm O.D. convention)

Can we call it a head tube assembly? Or head tube interface? This: http://upload.wikimedia.org/...ame_met_balhoofd.JPG

Quote:
The head tube on the IA is not round and closer to 200mm at its widest point, not 30mm.
Look for a link to the patent applications. I don't think we're openly sharing this data; in fact, I think we're protecting it.
-SD

Ok, but the question in my mind still remains: more head tube or aero risers? How can NACA aero risers not be more aero than almost any other shape?

AndyF
bike geek
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
Quote | Reply
AndyF wrote:
Jim@EROsports wrote:
Bingo.
Since Superdave is awesome and responds to this thread...


Yes, I totally agree. Thank you, SuperDave, for sharing your knowledge. It might get challenged, but it is very much appreciated!
When I started on Slowtwitch some 13+ years ago I knew it all. Now that I've got 13 more years of experience and knowledge, I'm convinced I know very little.
Sometimes there are constants, like this gem:

SuperDave

Feb 26, 03 8:12

Post #10 of 11 (897 views)
Re: For your $3000...? [denewone] [In reply to] Edit | Delete | Quote | Reply

If your price tag is $3000, start there and work backwards. Perhaps you can afford a P3 frame with HED wheels, if that is $2300, you may be able to finish off the bike if they built it with 105, and FSA cranks. The premium frame and wheels are going to make the greatest gains in your time, riding on a Dura Ace brakeset or front derailleur just makes you pretty. The components are going to wear out part by part and you can make the switch to Dura Ace then, a small outlay of cash at each occurrence. A good pro shop would be willing to not just switch components to make the bike fit, but make the bike fit your budget. Gurus are pretty, Cervelos are fast.

SuperDave

In many other cases what I thought to be a rule (less is more) is often just a much too narrow view of a much larger topic (more is less). I've learned this in many subjects such as tube shapes, training volumes, etc...
I'd encourage challenging any/everything you read that contradicts what you know, think you know, or felt was obvious or an unwritten rule.

-SD

https://www.kickstarter.com/...bike-for-the-new-era
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:
In many other cases what I thought to be a rule (less is more) is often just a much too narrow view of a much larger topic (more is less). I've learned this in many subjects such as tube shapes, training volumes, etc...
I'd encourage challenging any/everything you read that contradicts what you know, think you know, or felt was obvious or an unwritten rule.
-SD

I totally agree, SuperDave. But data is the only thing that changes my 30 years of experience at this point.

AndyF
bike geek
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
Quote | Reply
AndyF wrote:
SuperDave wrote:

the head tube is the part of the frame that the fork steering axis passes through. I think you are thinking of steer (steerer) tube.
(28.6mm O.D. convention)

Can we call it a head tube assembly? Or head tube interface? This: http://upload.wikimedia.org/...ame_met_balhoofd.JPG
Quote:

The head tube on the IA is not round and closer to 200mm at its widest point, not 30mm.
Look for a link to the patent applications. I don't think we're openly sharing this data; in fact, I think we're protecting it.
-SD

Ok, but the question in my mind still remains: more head tube or aero risers? How can NACA aero risers not be more aero than almost any other shape?

Think about this one, given identical equipment otherwise, what do you think is more aerodynamic on a -20, 0, 20 yaw sweep at 40kph:

58cm XL IA with zero arm rest/extension risers:


Or a 54cm with ~40mm of risers to get the same pad stack and rider position:


-SD

https://www.kickstarter.com/...bike-for-the-new-era
Quote Reply
Re: Death of Long and Low Geometry [benjpi] [ In reply to ]
Quote | Reply
benjpi wrote:
Ritchey makes a C260 stem with a 25 degree rise. You can use it upside down and really get some good lowering of the basebar out of the deal, assuming you've already removed all the steerer tube spacers below the stem. Other than than, you can play tricks with your arm rests to get them lower, but that depends on your comfort level with fabricating your own parts.

I'd be careful getting a frame that's too small and running a longer stem. I've done that before, and it can be very difficult to manage the handling with that much weight being over the front wheel. You might have a different experience though.


Totally agree and IMHO I think is a hugely overlooked aspect. There are many bikes you can get long and low (particularly classic P3, QR Illicito, QR CD0.1..) on but weight distribution is a very very valid point.

90% of the brain's activity is used to balance your body within the gravitational field of earth. If your body is distorted mechanically (off balance), it begins to effect the other 10% of the brain's activity, which controls all the other body functions such as breathing, digestion, or thinking.
The less work muscles pertaining to posture and balance have to do on the bike the more one can focus and control the muscles providing power / movement in cycling this is why core stability is paramount to good cycling technique. It is important to bear in mind that many professional cyclists inevitably acquire this “on the job” through years of acclimation, as opposed to specific training.
You are looking to avoid several conditions that can occur whilst cycling, these being “Lower Crossed Syndrome” as proposed by physical therapist Vladamir Janda (a combination of tight hip flexors and a tight lower back, paired with weak abdominals and weak gluteals) and “Upper Crossed Syndrome” (excessive weight bearing forward leading to a tendency for the elbows to lock up in order to bear the body weight and greater loading being placed upon the neck and shoulder musculature).
Evidence of prolonged isometric contraction in postural muscles due to excessive weight bearing over the front of the bike in upper body, is never a good thing, especially in females, why?.... Sherrington’s law of reciprocal innervation states that for every neural activation of a muscle there is a corresponding inhibition of the opposing muscle.

Many years ago Dan / Slowman proposed some % split front vs. back in terms of weight distribution that I think are spot on guidelines and I'd go as far to suggest that that thinking probably influenced some the geometry design in early QR bikes....

My 2c.....

David T-D
http://www.tilburydavis.com
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:

Think about this one, given identical equipment otherwise, what do you think is more aerodynamic on a -20, 0, 20 yaw sweep at 40kph:
58cm XL IA with zero arm rest/extension risers:
Or a 54cm with ~40mm of risers to get the same pad stack and rider position:
-SD

Need more details. Lots of geometry is changing between those 2 setups. Rider or riderless? The same negative forearm angles? The same bikes as in your pics? Even the brakes?

AndyF
bike geek
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
Quote | Reply
I wish I had seen this further back in the year, not a great time to get a new fit before IMAZ. I am sure I will be scheduling something at the beginning of the year... I want to try to get lower, as I think it will be more comfortable and faster.
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
Quote | Reply
AndyF wrote:
SuperDave wrote:


Think about this one, given identical equipment otherwise, what do you think is more aerodynamic on a -20, 0, 20 yaw sweep at 40kph:
58cm XL IA with zero arm rest/extension risers:
Or a 54cm with ~40mm of risers to get the same pad stack and rider position:
-SD


Need more details. Lots of geometry is changing between those 2 setups. Rider or riderless? The same negative forearm angles? The same bikes as in your pics? Even the brakes?

100% the same rider position
same saddle height
same pad stack, same pad width

The photos were just for reference to get you an idea of the differences between a flat-stacked bar on a big head tube and one with 40mm of risers on a 4cm lower head tube to give the same resultant bar height.
Apples to apples on the component spec and rider position, the only thing that would change is the frame size and arm rest and extension riders; other equipment stays constant.

Essentially I'm asking if you think the smaller bike/head tube has less drag. I think that is what you are saying when you ask for a low frame with lots of aerobar riser/pad stack. And you are probably right when most frames are concerned, certainly you'd be right in the case of the photo you shared.

-SD

https://www.kickstarter.com/...bike-for-the-new-era
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:
Essentially I'm asking if you think the smaller bike/head tube has less drag. I think that is what you are saying when you ask for a low frame with lots of aerobar riser/pad stack. And you are probably right when most frames are concerned, certainly you'd be right in the case of the photo you shared.
-SD

It's *almost* what I'm saying. I'm saying that you leave all the other geometry the same so that stems and bar lengths don't change. The only element I would like to see different is the height of the head tube. I'd like to see a low frame stack, leaving all other bike dimensions the same (seat tube angle, top tube length, etc..) With that lone change, I'd like to compare how a tall head tube compares to more armpad riser stack. Preferably between +/- 7deg yaw. (Remember, we measure yaw "in the wild".)

AndyF
bike geek
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
Quote | Reply
AndyF wrote:

Ok, it's going to take some time for me to wrap my head around the Felt aero head tube concept, then.

Are you saying that 111mm of 3cm diameter head tube has less drag than 111mm of 2 NACA0030 (or NACA0012 for non-UCI) aero risers? Is there any public data on this?

Never underestimate interference drag. The Speed Concept doesn't use a monoraiser just for show.

____________________________________
Pain is inevitable. Suffering is up to you.
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:
Essentially I'm asking if you think the smaller bike/head tube has less drag. I think that is what you are saying when you ask for a low frame with lots of aerobar riser/pad stack. And you are probably right when most frames are concerned, certainly you'd be right in the case of the photo you shared.
-SD

Just to answer your very legit question... I would say the smaller head tube setup would do better at low yaw, while the taller head tube has more sail effect going on, so it will do better at higher yaw. Let's see how I do! :-)

AndyF
bike geek
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
Quote | Reply
AndyF wrote:
SuperDave wrote:

Essentially I'm asking if you think the smaller bike/head tube has less drag. I think that is what you are saying when you ask for a low frame with lots of aerobar riser/pad stack. And you are probably right when most frames are concerned, certainly you'd be right in the case of the photo you shared.
-SD


Just to answer your very legit question... I would say the smaller head tube setup would do better at low yaw, while the taller head tube has more sail effect going on, so it will do better at higher yaw. Let's see how I do! :-)

Nailed it.

There is also the interference referenced above and when you decide to go to risers you need to use lots of them (depending on many factors such as hand position) to achieve the gain you are talking about.

You need enough separation that the air sees a blob of hands/arms and a nice clean airfoil, not a big blob with the lower half having clean fast air. Lift in the y-vertical direction doesn't help you :)

-SD

https://www.kickstarter.com/...bike-for-the-new-era
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:

There is also the interference referenced above and when you decide to go to risers you need to use lots of them (depending on many factors such as hand position) to achieve the gain you are talking about.

You need enough separation that the air sees a blob of hands/arms and a nice clean airfoil, not a big blob with the lower half having clean fast air. Lift in the y-vertical direction doesn't help you :)

-SD


Ok, so those are some real nuggets of wisdom, SuperDave. For anyone out there who want to be faster, this is information you can really use!


I'm thinking that this is the reason we often see that a little uptilt on the forearms, when used with armpad risers, really helps lower aero drag. You're moving the hands out of the airstream that's hitting the risers, maybe, SuperDave?

Thank you for your valuable insight. I certainly will use it with my own testing, and it gives me some interesting ideas for track pursuit, too.

AndyF
bike geek
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
Quote | Reply
AndyF wrote:
SuperDave wrote:


There is also the interference referenced above and when you decide to go to risers you need to use lots of them (depending on many factors such as hand position) to achieve the gain you are talking about.

You need enough separation that the air sees a blob of hands/arms and a nice clean airfoil, not a big blob with the lower half having clean fast air. Lift in the y-vertical direction doesn't help you :)

-SD



Ok, so those are some real nuggets of wisdom, SuperDave. For anyone out there who want to be faster, this is information you can really use!


I'm thinking that this is the reason we often see that a little uptilt on the forearms, when used with armpad risers, really helps lower aero drag. You're moving the hands out of the airstream that's hitting the risers, maybe, SuperDave?

Thank you for your valuable insight. I certainly will use it with my own testing, and it gives me some interesting ideas for track pursuit, too.

Funny you mentioned track pursuit. My bike and position that I use on the track has huge risers that I made by cutting down some 70mm chunks of aero seatpost and bolting through them to the base bar. On our Tk1 that uses UCI legal tube shapes we cannot build a sail to the same degree that we can on the IA. We can squeeze ~160mm depth and push just past 4:1 on the airfoil shapes but that's not nearly the same high lift generating 8:1+ on the IA.

In this case I run a custom 54cm Bayonet road fork on my 57cm Tk1 that has been cut down so the custom Bayonet stem mounts in front of, not on top of the fork. Here I am trying to do as you suggest and make a bike with little to no head tube and get the stack I need using 19mm seatpost shaped risers, not 45mm wide ~4:1 airfoils.


https://www.kickstarter.com/...bike-for-the-new-era
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:
AndyF wrote:
SuperDave wrote:

Essentially I'm asking if you think the smaller bike/head tube has less drag. I think that is what you are saying when you ask for a low frame with lots of aerobar riser/pad stack. And you are probably right when most frames are concerned, certainly you'd be right in the case of the photo you shared.
-SD


Just to answer your very legit question... I would say the smaller head tube setup would do better at low yaw, while the taller head tube has more sail effect going on, so it will do better at higher yaw. Let's see how I do! :-)

Nailed it.

There is also the interference referenced above and when you decide to go to risers you need to use lots of them (depending on many factors such as hand position) to achieve the gain you are talking about.

You need enough separation that the air sees a blob of hands/arms and a nice clean airfoil, not a big blob with the lower half having clean fast air. Lift in the y-vertical direction doesn't help you :)

-SD

Yeah, I know the Profile Aeria begins to de very well with 40mm of spacers.

Andy is also correct - when you angle the arms up properly, it's almost 10 watts for everyone. Even when we angle up an entire bar like the TriRig, we see enough of a net gain to make it worth hurting the shape of the bar. In the end, it's about getting the athlete in the best position because you'll see far more gains from that than anything a frame will give you.

Always remember the top 10 Heiarchy of ERO. Numbers 1-5:
1. Position
2. Position
3. Position
4. Position
5. Position

:-)

Jim Manton / ERO Sports
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
Quote | Reply
Would there be the same benefit of angling the bars upwards if there are no spacers at all? Since the vertical distance between the hands and the base bar wouldn't be as much, if there were no spacers.
Quote Reply
Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
Quote | Reply
Nick B wrote:
Rover24 wrote:
The Giant Trinity Advanced is pretty long and low.


Not a super bike either, has similar performance to an old p3.

?? Could argue it is the original super bike.
Quote Reply
Re: Death of Long and Low Geometry [J_R] [ In reply to ]
Quote | Reply
I think the GT SB1 was the original superbike.

SD

https://www.kickstarter.com/...bike-for-the-new-era
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:
I think the GT SB1 was the original superbike.

SD

Gonna disagree and counter with Look from the early 90's. Integrated fork, huge aero tubes & cutout ST to shield the rear wheel....and an ergo stem to boot!!!



Chicago Cubs - 2016 WORLD SERIES Champions!!!!

"If ever the time should come, when vain and aspiring men shall possess the highest seats in government, our country will stand in need of its experienced patriots to prevent its ruin." - Samuel Adams
Quote Reply
Re: Death of Long and Low Geometry [SuperDave] [ In reply to ]
Quote | Reply
SuperDave wrote:
I think the GT SB1 was the original superbike.

SD

I'll defer to your market knowledge, but it was certainly ahead of the recent curve with integrated stem along with integrated bars & both brakes "hidden".

In any case, the above was the first time that I have seen anyone say it wasn't among the SB.
Quote Reply
Re: Death of Long and Low Geometry [J_R] [ In reply to ]
Quote | Reply
What makes a Superbike? A super marketing, or a frame that lets you achieve your individual fastest setup / package?

With a Scott Plasma III TT Size S you can reach a stack of 50.5 cm (I just measured it by my own).
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
Quote | Reply
Jim@EROsports wrote:
Yeah, I know the Profile Aeria begins to de very well with 40mm of spacers.

Andy is also correct - when you angle the arms up properly, it's almost 10 watts for everyone. Even when we angle up an entire bar like the TriRig, we see enough of a net gain to make it worth hurting the shape of the bar. In the end, it's about getting the athlete in the best position because you'll see far more gains from that than anything a frame will give you.

Hi Jim, do you mind me asking is the underlined caveated by what combination of frame stack vs pad stack you are using? Is that mainly correct only when you are using a bunch of aero pad spacers like the Aeria?

Reason for asking - my setup is the opposite. I needed a tonne of reach due to my preferred seat tube angle and apparently short legs, so at 5'9" I'm on a 56 P3C but with a -17 stem, low profile headset cap with no spacers and Felt Devox Bayonet bars (the carbone ones) with the lowest pad spacer. So I'm on a really low pad stack bar sitting right on top of the head tube. And I'm wondering where to put my hands!!

Appreciate all the info coming out on this thread, really interesting and thanks to you guys who do this for a living sharing some of the knowledge. I'd be booked in to aero camp .... if you did one in the UK! Of course if I could get Andy to come over to run some sessions at the Manchester Velodrome I'd happily take him on a guided tour of this years' TDF stage 2 main climb which is right on my doorstep, and treat you to some proper yorkshire ales.. ;-)

Cheers,
Rich.
Quote Reply
Re: Death of Long and Low Geometry [BergHügi] [ In reply to ]
Quote | Reply
BergHügi wrote:
What makes a Superbike? A super marketing, or a frame that lets you achieve your individual fastest setup / package?

With a Scott Plasma III TT Size S you can reach a stack of 50.5 cm (I just measured it by my own).

http://www.slowtwitch.com/...bikes_Fit__3266.html
Quote Reply
Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
Quote | Reply
Ok...the Tririg Alpha gets you a lot of adjustability if you are racing non-UCI events.

I calculate that you can get Pad Stack: 544mm Pad Reach: 544mm with a 54cm P5 with 5 mm of steering spacer, a 110mm -17 stem, and a tri rig Alpha Bar with the pads mounted on the bar and all the way forward (so 10mm of stack 30mm of additional reach).
Quote Reply
Re: Death of Long and Low Geometry [BergHügi] [ In reply to ]
Quote | Reply
A superbike is one with extremely low drag.
It may or may not let you get in your best position. If it doesn't, don't ride that superbike.

The OP wants a superbike that he can ride.

BergHügi wrote:
What makes a Superbike? A super marketing, or a frame that lets you achieve your individual fastest setup / package?

With a Scott Plasma III TT Size S you can reach a stack of 50.5 cm (I just measured it by my own).



Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter
Quote Reply
Re: Death of Long and Low Geometry [J_R] [ In reply to ]
Quote | Reply
J_R wrote:
BergHügi wrote:
What makes a Superbike? A super marketing, or a frame that lets you achieve your individual fastest setup / package?

With a Scott Plasma III TT Size S you can reach a stack of 50.5 cm (I just measured it by my own).


http://www.slowtwitch.com/...bikes_Fit__3266.html


I thought about a superbike which enables low stack without a down pointing stem and for 28" wheels.
Quote Reply
Re: Death of Long and Low Geometry [pyrahna] [ In reply to ]
Quote | Reply
what stem is only 7mm from base of stem to center of bar at -17deg? that's is all you have 544-522(54 p5 stack)-10(rest stack above center of clamp area)-5(cap you specified)=7mm. considering alpha is 31.8 dia/2=15.9mm to center which is greater than 7mm you have and includes nothing for the clamping dimensions of stem, you need more drop than a -17 stem will give

I forget if OP was measuring to top of pad or top of rest, but if pad is included you have nothing left.

even a 51 might be a tad too tall for that experiment
Last edited by: jeffp: Oct 24, 14 7:01
Quote Reply
Re: Death of Long and Low Geometry [pyrahna] [ In reply to ]
Quote | Reply
pyrahna wrote:
Ok...the Tririg Alpha gets you a lot of adjustability if you are racing non-UCI events.

I calculate that you can get Pad Stack: 544mm Pad Reach: 544mm with a 54cm P5 with 5 mm of steering spacer, a 110mm -17 stem, and a tri rig Alpha Bar with the pads mounted on the bar and all the way forward (so 10mm of stack 30mm of additional reach).

Putting an alpha on a p5 takes away the integration that gets the P5 some of its gains over the p3 and p4. Maybe all of the gains. I can't see spending $7k plus to remove the integration and MAYBE get faster.

Ironman Certified Coach

Currently accepting limited number of new athletes
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
Quote | Reply
Jim@EROsports wrote:
There is nothing more fun for me than dropping the aero bars on the fit bike and watching the client's face as they're shocked at how much more comfortable the position becomes. Favorite part of the fit! Not something you can do without a fit bike - not very well anyway.


From the other side: I still remember my first race on a triathlon bike very clearly. It was on a "shop fit" administered immediately after purchase, and the fitter pushed me back ("Your knees will implode") and up ("Can't sustain that height"). It seemed alright on the trainer, it seemed fine when I trained with friends - but up against a headwind, I felt so frustrated that I couldn't "just tuck lower" like on my road bike that I gripped the extensions below the basebars before realizing how stupid that was. I started fiddling with the fit ever since, eventually finding a comfortable spot far lower and further out (and despite sitting over the BB, my knees never blew up!). Whenever I sink my arms into the extensions - even after 6 months away from that bike - it just "clicks" right. I'd love to tweak it properly with a good fitter once I move to Europe since I feel like I could go lower, but I'd rather have a professional do that.

P.S: On the subject of old women going comfortable & low: My mum was finally convinced to let go of her old slack-geometry bike, and this beauty seems to fit her quite perfectly. With no large change in fitness, she's been setting PRs across the board and a fastest split in her AG at IM Frankfurt on this position:


ZONE3 - We Last Longer
Quote Reply
Re: Death of Long and Low Geometry [Jim Martin] [ In reply to ]
Quote | Reply
With the alpha/sigma you get really close to the exact same integration.

Jim Martin wrote:
Putting an alpha on a p5 takes away the integration that gets the P5 some of its gains over the p3 and p4. Maybe all of the gains. I can't see spending $7k plus to remove the integration and MAYBE get faster.



Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
Quote | Reply
It also never ceases to amazing me how people have been conditioned to accept less than optimal positions, or buy into the flexibility or aggressive is less comfortable myths. Flexibility has nothing to do with it, it doesn't take significant adaptation time (if any), lower is almost always more comfortable

Glad to get some confirmation from an expert.

I'm 54 with an f'ed up back and neck and I don't have any problems getting low. Er... what I mean is that I don't have any problems that going *higher* would fix.

The important thing for me is to RELAX the lower back. Once I figured that out I could rotate my hips. It also required that I change my pedaling style, how my muscles engaged through the stroke... I wonder if that is something that is often missed? Because unless I do that, going low is nothing but painful.

I think a lot of riders get habituated to a pedal stroke that requires an open position and a tense back... really bracing with the back muscles on the downstroke. I know that was the case with me. It was impossible to go low for any length of time until I changed that.

Quote Reply
Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
Quote | Reply
The point is that pretty much all the bikes fit the same. The only difference is aerodynamics and price. How many more bikes with the same characteristics do you need on the market?

The other thing that is wack way frames are sized. We often see tiny and unnecessary steps in stack and reach between frame sizes, but they both change in concert. So you are stuck with whatever the company decided should be the progression of stack and reach.

A much better system would be 3 or 4 reach sizes and 2 significantly different stack options for each. That's only 6 or 8 sizes and you can accommodate everyone. You could even make the "tall" option taller than what is currently typical.

Quote Reply
Re: Death of Long and Low Geometry [jackmott] [ In reply to ]
Quote | Reply
jackmott wrote:
With the alpha/sigma you get really close to the exact same integration.

Jim Martin wrote:

Putting an alpha on a p5 takes away the integration that gets the P5 some of its gains over the p3 and p4. Maybe all of the gains. I can't see spending $7k plus to remove the integration and MAYBE get faster.

Yeah, if a client wants a P5, I almost always tell them to stay away from the P5-6. Better to get the P5-3 and have a wider range of adjustment/options. Then again, why not a P3?

Jim Manton / ERO Sports
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
Quote | Reply
I find getting a p5-3 as low as the p5-6(with swapped fork) in a uci configuration is a lot tougher. for instance, the lowest pad stack on zipp stealth is over 30mm higher than the aduro. other uci set ups might require down sloping stems(not aero) or mounting extensions below basebar.(is that as aero as only having stuff above?)
Quote Reply
Re: Death of Long and Low Geometry [knighty76] [ In reply to ]
Quote | Reply
knighty76 wrote:
Jim@EROsports wrote:

Yeah, I know the Profile Aeria begins to de very well with 40mm of spacers.

Andy is also correct - when you angle the arms up properly, it's almost 10 watts for everyone. Even when we angle up an entire bar like the TriRig, we see enough of a net gain to make it worth hurting the shape of the bar. In the end, it's about getting the athlete in the best position because you'll see far more gains from that than anything a frame will give you.


Hi Jim, do you mind me asking is the underlined caveated by what combination of frame stack vs pad stack you are using? Is that mainly correct only when you are using a bunch of aero pad spacers like the Aeria?

Reason for asking - my setup is the opposite. I needed a tonne of reach due to my preferred seat tube angle and apparently short legs, so at 5'9" I'm on a 56 P3C but with a -17 stem, low profile headset cap with no spacers and Felt Devox Bayonet bars (the carbone ones) with the lowest pad spacer. So I'm on a really low pad stack bar sitting right on top of the head tube. And I'm wondering where to put my hands!!

Appreciate all the info coming out on this thread, really interesting and thanks to you guys who do this for a living sharing some of the knowledge. I'd be booked in to aero camp .... if you did one in the UK! Of course if I could get Andy to come over to run some sessions at the Manchester Velodrome I'd happily take him on a guided tour of this years' TDF stage 2 main climb which is right on my doorstep, and treat you to some proper yorkshire ales.. ;-)

Cheers,
Rich.

For arms angled up? No, that's about position, and is not (that we've seen) contingent on spacer setup. When you get the arms angled just so, there's typically a 10 watt gain (understand these are averages) for the athlete even when you maintain the same back angle relative to the horizon. Unless, of course, you're forced to angle the entire aero bar up, then your gain will be less, but you're still likely to see 4-6 watts. The other benefit is it's more comfortable, too, as it allows you to rest into the pads much better and your shoulder and upper back are more relaxed. This might actually be a big part of the gain, by the way...a more relaxed rider, I suspect, has less lean/steer, and, therefore, a lower CdA.

I could be wrong, but I believe lean/steer has a pretty significant impact on CdA - perhaps more than we've realized. When you angle the arms up too much, you destabilize the rider and get more lean/steer. We typically see higher CdA's when this happens, which you wouldn't see in a tunnel since the rider is being held in place and there is no lean/steer. The question we haven't yet answered is, "If given enough riding time, will the athlete adapt and have less lean/steer resulting in a reduced CdA?" The same question could be asked of narrower elbows. I'll be working with a name many of you will remember from the not-too-distant past, Sergio Escutia, over the Winter to answer some of these questions. For those of you who remember from his days as a junior with his Father posting quite often here on Slowtwitch, Sergio has grown into a fine young man and road cyclist, and is an excellent test subject due to his ability and track experience.

Jim Manton / ERO Sports
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
Quote | Reply
Jim@EROsports wrote:
Yeah, if a client wants a P5, I almost always tell them to stay away from the P5-6. Better to get the P5-3 and have a wider range of adjustment/options. Then again, why not a P3?

Well you get a watt or two savings from the hidden brake and seat tube maybe!



Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
Quote | Reply
Jim@EROsports wrote:
when you angle the arms up properly, it's almost 10 watts for everyone.

Jim,

Could you define precisely what you mean by "properly" (in terms of angle and/or anatomical landmarks)?

This was one of the 1st things I tested for myself back when I first started doing a lot of field testing 10+ y ago, and at least for me John Cobb's rule-of-thumb (haha!) for forearm angle proved to hold true (see below - "down" and "up" from that "level" position represent changes of 5-10 deg). (Note that these experiments were performed using a bog-standard spoked rear wheel and my wife's venerable P2T...hence the high baseline CdA.)


Last edited by: Andrew Coggan: Oct 24, 14 8:52
Quote Reply
Re: Death of Long and Low Geometry [jackmott] [ In reply to ]
Quote | Reply
jackmott wrote:
With the alpha/sigma you get really close to the exact same integration.



But if the goal is to get lower than the stock P5 allows, does this configuration get you there? Since the sigma is only flat (or rise) and not negative? Obviously the alpha can get you less stack than the aduro, but in that configuration, the alpha extensions are under the bar and thus more in the wind (I THINK).

I did ask nick about working something up where I could put the pads on the base bar and the extensions right ABOVE the pads. His response left me thinking he wasn't interested in working it out with me.

I sometimes think about going with the alpha on the p4, but I just don't think it could be much better than the older devox that I have (pads almost bolted to base and extensions integral into base, not under it or over it). Only reason the pads are not literally on the base bar is that I had to modify them to bring them narrower and doing so requires that they come up 5 mm.

I probably would have bought and tested this on my P4 (even with Nick's discouragement), but from all the conversations (for the price) the alpha is a little "rough around the edges".

Ironman Certified Coach

Currently accepting limited number of new athletes
Last edited by: Jim Martin: Oct 24, 14 11:34
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
Quote | Reply
Jim,

Yes, per AC's question, could you specify the general angle you are talking about? Or what range it generally falls.
Quote Reply
Re: Death of Long and Low Geometry [jackmott] [ In reply to ]
Quote | Reply
jackmott wrote:
Well you get a watt or two savings from the hidden brake and seat tube maybe!

I was lucky enough to have a 5 minute conversation recently with a fit/aero guru that we all respect. I was telling him that I loved my P4 but couldn't fit on a new super bike (we talked about several).

When talking about the P5, he said, if you need to put your own bars on to get into position on a P5, NP3 or NP2 is probably about as good. I brought up the rear brake and he kind of laughed at me and said something to the effect that it didn't matter much if at all. I suspect it is because of the rough air riding behind the rider's legs. What do I know though.

Ironman Certified Coach

Currently accepting limited number of new athletes
Quote Reply
Re: Death of Long and Low Geometry [jeffp] [ In reply to ]
Quote | Reply
I used a stem with a stem with a clamp area of 34mm which is admittedly small, but in the realm of possibility. Take half that, 17mm for the centerline of the stem, and then tilt the axis back 17 degrees for a steering axis of 73 degrees and you should end up with my math. Your welcome to come up with your own numbers using http://www.theprobikefit.com/Home/FullTriBike (full disclosure I wrote the site, and if you find an error in my math I will do my best to fix it)
Quote Reply
Re: Death of Long and Low Geometry [Jim Martin] [ In reply to ]
Quote | Reply
Good points, not sure!

Jim Martin wrote:
jackmott wrote:
With the alpha/sigma you get really close to the exact same integration.


But if the goal is to get lower than the stock P5 allows, does this configuration get you there? Since the sigma is only flat (or rise) and not negative? Obviously the alpha can get you less stack than the aduro, but in that configuration, the alpha extensions are under the bar and thus more in the wind (I THINK).

I did ask nick about working something up where I could put the pads on the base bar and the extensions right ABOVE the pads. His response left me thinking he wasn't interested in working it out with me.

I sometimes think about going with the alpha on the p4, but I just don't think it could be much better than the older devox that I have (pads almost bolted to base and extensions integral into base, not under it or over it). Only reason the pads are not literally on the base bar is that I had to modify them to bring them narrower and doing so requires that they come up 5 mm.

I probably would have bought and tested this on my P4 (even with Nick's discouragement), but from all the conversations (for the price) the alpha is a little "rough around the edges".



Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter
Quote Reply
Re: Death of Long and Low Geometry [pyrahna] [ In reply to ]
Quote | Reply
522(frame stack)+17(stem stack)+10(armrest stack for alpha min from center of stem clamp)+5(stem cap) does not equal 544 that is all the math I need to do as it is still 1 cm too high from your target . don't forget to add cee gee pads to top of that. means 51 max p2/3/5 size and then a longer stem as well than you spec'd
Last edited by: jeffp: Oct 24, 14 11:35
Quote Reply
Re: Death of Long and Low Geometry [Andrew Coggan] [ In reply to ]
Quote | Reply
Andy

My understanding from physio's is that broader across the shoulder individuals do well angling arms up because it lessens the tension on the biceps and since the biceps (short head) inserts on the scapula less "winging" of the scapula occurs and thus breathing / comfort is appreciably better and allows easier "turtling" of the head thanks to less upper back tension.

So my question would be are you particularly broad across the shoulders or not?

Regards

David

David T-D
http://www.tilburydavis.com
Quote Reply
Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
Quote | Reply
Thanks for starting this thread, it has been awesome so far. Even though I haven't figured out a way to improve from where I am, at least I have figured at that where I am is not so bad after all!

Ironman Certified Coach

Currently accepting limited number of new athletes
Quote Reply
Re: Death of Long and Low Geometry [Jim Martin] [ In reply to ]
Quote | Reply
Jim Martin wrote:
I brought up the rear brake and he kind of laughed at me and said something to the effect that it didn't matter much if at all.

Oh I am sure it isn't *much*
But if money is no object, every second is nice.



Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter
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Re: Death of Long and Low Geometry [Andrew Coggan] [ In reply to ]
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Andrew Coggan wrote:
Jim@EROsports wrote:
when you angle the arms up properly, it's almost 10 watts for everyone.

Jim,

Could you define precisely what you mean by "properly" (in terms of angle and/or anatomical landmarks)?

This was one of the 1st things I tested for myself back when I first started doing a lot of field testing 10+ y ago, and at least for me John Cobb's rule-of-thumb (haha!) for forearm angle proved to hold true (see below - "down" and "up" from that "level" position represent changes of 5-10 deg). (Note that these experiments were performed using a bog-standard spoked rear wheel and my wife's venerable P2T...hence the high baseline CdA.)


Respectfully, those numbers we save for clients; however, I believe I have the range identified and you don't typically need to go beyond UCI's maximum allowed rule for tip of the extensions 10cm above the arm pad (wow, that sentence sounds bad!)

I'm not the only person finding these results either. Many have measured similar numbers. Taking a look at the setup for Worlds TT, you can see many riders have adopted a hands up position.

I have a theory that the reason hands below the elbows can sometimes test fast is a rider who prefers that hand position seems to prefer pulling up on the extensions, which effectively pulls the torso lower thus lowering frontal area. Thoughts?

Jim Manton / ERO Sports
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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I find myself in-line with this thinking.


Additionally, holding the very tips of a ski bend gives greater clearance beneath the forearms for a BTA setup. To me, though, that was an added benefit. I do it because its more comfy (on account of the bicep-shoulder-back chain mentioned above) and allows me to more easily turtle.

Whenever I've done a fit (don't claim to be professional), I will move the extensions entirely out of the way and act as the end of the extension myself, raising and lowering their hands while watching the person's shoulders and mid-back. Moving it back and forth you can watch how the back arches and flattens within a range (and back muscles gain tension/relax). I raise the hands until we hit a point where the back stops flattening and no more--put the extensions there. With s-bends it looks "semi-mantis"-like, but oftentimes the ski bends are level and it's more about teaching the "fitted" where to grip the extensions.

As for the whole aggressive/conservative/etc position language--I find my tri bike far less enjoyable than my road bike. But it's sustainable for my race distances (halfs and shorter) Given my very low position, I get a lot of comments how uncomfortable it must be. So, yeah, there's a lot of FUD about positioning--I try and remind anyone that one should aim for the lowest/longest position one can sustain. That just happens to be a lot longer/lower than they think. :)

Nick (OP) -- I'd be inclined to try a slightly higher stack with a bit more reach (like, um, a bigger frame). Even if you find your shoulder angle becoming obtuse. I don't think your position is as dire as you make it, although I wholly agree with the lament of no long/low frames. I have an -25 stem on my bike...

The question of who is right and who is wrong has seemed to me always too small to be worth a moment's thought, while the question of what is right and what is wrong has seemed all-important.

-Albert J. Nock
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Re: Death of Long and Low Geometry [rruff] [ In reply to ]
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rruff wrote:
It also never ceases to amazing me how people have been conditioned to accept less than optimal positions, or buy into the flexibility or aggressive is less comfortable myths. Flexibility has nothing to do with it, it doesn't take significant adaptation time (if any), lower is almost always more comfortable

Glad to get some confirmation from an expert.

I'm 54 with an f'ed up back and neck and I don't have any problems getting low. Er... what I mean is that I don't have any problems that going *higher* would fix.

The important thing for me is to RELAX the lower back. Once I figured that out I could rotate my hips. It also required that I change my pedaling style, how my muscles engaged through the stroke... I wonder if that is something that is often missed? Because unless I do that, going low is nothing but painful.

I think a lot of riders get habituated to a pedal stroke that requires an open position and a tense back... really bracing with the back muscles on the downstroke. I know that was the case with me. It was impossible to go low for any length of time until I changed that.


I think I have same the problem.. but on my road bike. When I rotate my pelvis forward, my back is trying to pull me in to a postieor tilt still.

Use to have the saddle high and forward caused me to posterity tilt and flex at the low back excessively I have developed my lower spinal erectors from that bad position.. Now I have kinda figured out I needed more setback and lower saddle to rotate the pelvis more forward to line out the low back.. Breathing is so much better in this position too. My low back is still trying to flex but I do have the ability to rotate my pelvis forward much easier since Ive used a selle smp. I use to be umcomfy on every saddle. So thats what probably made me posterior tilt so I can sit on the sit bones better. Selle smp has been the best saddle by far.

Here is a video of me rotating the pelvis, I feel when I do rotate I feel a bit restricted in the hips at the top of the pedal stroke I can only keep it there for a while but not when im putting power out, I feel I have to flex at the spine

Anyone know what changes can help me relax my low back?

https://www.youtube.com/watch?v=0BiCpRbDauM

Last edited by: SamYO: Oct 25, 14 7:12
Quote Reply
Re: Death of Long and Low Geometry [Andrew Coggan] [ In reply to ]
Quote | Reply
Andrew Coggan wrote:
Jim@EROsports wrote:
when you angle the arms up properly, it's almost 10 watts for everyone.


Jim,

Could you define precisely what you mean by "properly" (in terms of angle and/or anatomical landmarks)?

This was one of the 1st things I tested for myself back when I first started doing a lot of field testing 10+ y ago, and at least for me John Cobb's rule-of-thumb (haha!) for forearm angle proved to hold true (see below - "down" and "up" from that "level" position represent changes of 5-10 deg). (Note that these experiments were performed using a bog-standard spoked rear wheel and my wife's venerable P2T...hence the high baseline CdA.)



I think SuperDave finally added the last piece, at least in my own mind, to this puzzle. When using aero armpad risers and level or negative-angled forearms, the flow to the risers becomes obstructed. Adding a slight positive angle allows air to flow more freely through the risers by getting the hands out of the way.

Off-topic remark:
Btw, in terms of stability, when we do aero tests we notice that adding a little bit of forearm tilt creates more axial stability in bike position. If it's done right, the riders stay solidly on the same spot on the saddle. When we see CdAs jumping around a lot, it's usually because of some sort of unstable contact point on the saddle.

It's pretty subtle, but saddle contact instability can be seen even at the elite levels. Here's an example of something that would lead to CdA drift at the women's Worlds ITT race with Christine Majerus (LUX):
(at 1:49:20, 1:49:29 and 1:49:36 of the video timeline)

and a little more prominently here with Audrey Cordon (FRA), who's clearly falling off her saddle, in this case (in my opinion) because of too much reach and perhaps a misuse of s-bend bars:


The point I'm trying to make is that the correct use of forearm positive tilt to stabilise the position ( skeletal support, stable contact points, etc... ) makes CdA measurement a lot less variable.

One last point -- if you want to see a frickin' solid positioning job done by one of the best positioning coaches in the world, have a look at Katrin Garfoot (AUS). Notice the quiet upper body and stable core:


AndyF
bike geek
Last edited by: AndyF: Oct 25, 14 8:16
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Re: Death of Long and Low Geometry [rruff] [ In reply to ]
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rruff wrote:
A much better system would be 3 or 4 reach sizes and 2 significantly different stack options for each. That's only 6 or 8 sizes and you can accommodate everyone. You could even make the "tall" option taller than what is currently typical.

Isn't that basically what BMC did with the TM01? Small, Medium-Short, Medium-Long and Large. The S/T plot looks a bit like a zig-zag, but I guess that gives at least one more option than other manufacturers do.

ZONE3 - We Last Longer
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Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
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AndyF wrote:

The point I'm trying to make is that the correct use of forearm positive tilt to stabilise the position ( skeletal support, stable contact points, etc... ) makes CdA measurement a lot less variable.

I've been saying that for years ;-) http://forum.slowtwitch.com/...post=2621421#2621421

That "locked in" position (which is not only a function of the bar position/angle, but also the saddle) is probably why my field test runs tend to be quite smooth/repeatable.

http://bikeblather.blogspot.com/
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Re: Death of Long and Low Geometry [SamYO] [ In reply to ]
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Anyone know what changes can help me relax my low back?

Practice. Release all unnecessary tension. Focus on relaxing your core, then pedal... while making sure to keep your core relaxed.

The muscle engagement will feel weird at first, but you'll get used to it.

Quote Reply
Re: Death of Long and Low Geometry [Tom A.] [ In reply to ]
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Tom A. wrote:
AndyF wrote:

The point I'm trying to make is that the correct use of forearm positive tilt to stabilise the position ( skeletal support, stable contact points, etc... ) makes CdA measurement a lot less variable.


I've been saying that for years ;-) http://forum.slowtwitch.com/...post=2621421#2621421

That "locked in" position (which is not only a function of the bar position/angle, but also the saddle) is probably why my field test runs tend to be quite smooth/repeatable.


Yeah, but we're all sick and tired of you being so darned smart, Tom. Let some us recycle your old nuggets of wisdom now and again, ok? ;-)

Let me summarise with a Canadian song:
https://www.youtube.com/watch?v=QE2joQsWXJg

AndyF
bike geek
Last edited by: AndyF: Oct 25, 14 10:21
Quote Reply
Re: Death of Long and Low Geometry [rruff] [ In reply to ]
Quote | Reply
rruff wrote:
Anyone know what changes can help me relax my low back?

Practice. Release all unnecessary tension. Focus on relaxing your core, then pedal... while making sure to keep your core relaxed.

The muscle engagement will feel weird at first, but you'll get used to it.

I think there is a bit more to it then that, like getting the right setback
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
Quote | Reply
AndyF wrote:
Tom A. wrote:
AndyF wrote:

The point I'm trying to make is that the correct use of forearm positive tilt to stabilise the position ( skeletal support, stable contact points, etc... ) makes CdA measurement a lot less variable.


I've been saying that for years ;-) http://forum.slowtwitch.com/...post=2621421#2621421

That "locked in" position (which is not only a function of the bar position/angle, but also the saddle) is probably why my field test runs tend to be quite smooth/repeatable.


Yeah, but we're all sick and tired of you being so darned smart, Tom. Let some us recycle your old nuggets of wisdom now and again, ok? ;-)

Let me summarise with a Canadian song:
https://www.youtube.com/watch?v=QE2joQsWXJg

Those aren't nuggets, they're more like acorns...as in the thing even a blind squirrel (me) finds every once in awhile ;-)

http://bikeblather.blogspot.com/
Quote Reply
Re: Death of Long and Low Geometry [Tom A.] [ In reply to ]
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Ok, then... you're a really smart squirrel!

AndyF
bike geek
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Re: Death of Long and Low Geometry [SamYO] [ In reply to ]
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I think there is a bit more to it then that, like getting the right setback

Experiment. IME position is much less important than paying attention to tension and muscle engagement. Most people let the position and their lizard brain dictate their posture. If you do that you may find that no position "works".
Quote Reply
Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
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AndyF wrote:
One last point -- if you want to see a frickin' solid positioning job done by one of the best positioning coaches in the world, have a look at Katrin Garfoot (AUS). Notice the quiet upper body and stable core:


Spot on. Getting the right position is not everything. Stability is more important than people often think. Geez, look at Canuel following Garfoot, she was wiggling that way all along.

____________________________________
Pain is inevitable. Suffering is up to you.
Last edited by: Runorama: Oct 25, 14 12:01
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Re: Death of Long and Low Geometry [Runorama] [ In reply to ]
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Runorama wrote:
AndyF wrote:

One last point -- if you want to see a frickin' solid positioning job done by one of the best positioning coaches in the world, have a look at Katrin Garfoot (AUS). Notice the quiet upper body and stable core:


Spot on. Getting the right position is not everything. Stability is more important than people often think. Geez, look at Canuel following Garfoot, she was wiggling that way all along.

You can have both, too. But stability is certainly the priority. You need skeletal support otherwise you've got nothing.

AndyF
bike geek
Quote Reply
Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Jim@EROsports wrote:
...Andy is also correct - when you angle the arms up properly, it's almost 10 watts for everyone. ...

that is great to know as I am trying just that with my new bars.
I changes from the planet x bars with s-bends to a integrated vision bar with l-bends and naturally grab the l-bends at the very top around the shifter.

but now the problem I am having is that the pads are no longer parallel to my forearms resulting in pressure points at the bottom edge of the pads.
now I think about cutting some shims to glue between the armrests and pads. has anyone done something like that or would that result in too much sliding backwards as the pads are no longer horizontal.

jakob
Quote Reply
Re: Death of Long and Low Geometry [jakob1989] [ In reply to ]
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jakob1989 wrote:
Jim@EROsports wrote:
...Andy is also correct - when you angle the arms up properly, it's almost 10 watts for everyone. ...

but now the problem I am having is that the pads are no longer parallel to my forearms resulting in pressure points at the bottom edge of the pads.
now I think about cutting some shims to glue between the armrests and pads. has anyone done something like that or would that result in too much sliding backwards as the pads are no longer horizontal.
jakob

My guess is that angling the armpads would result in greater contact area. More comfort and even less sliding. But the entire system of linkages needs to examined carefully. For example, what is the shoulder angle? How well skeletally-supported are you?

Jim will surely have more experience with this, but off-hand, I would guess that your proposed change to the armpads would be beneficial.

AndyF
bike geek
Quote Reply
Re: Death of Long and Low Geometry [SamYO] [ In reply to ]
Quote | Reply
SamYO wrote:
rruff wrote:
It also never ceases to amazing me how people have been conditioned to accept less than optimal positions, or buy into the flexibility or aggressive is less comfortable myths. Flexibility has nothing to do with it, it doesn't take significant adaptation time (if any), lower is almost always more comfortable

Glad to get some confirmation from an expert.

I'm 54 with an f'ed up back and neck and I don't have any problems getting low. Er... what I mean is that I don't have any problems that going *higher* would fix.

The important thing for me is to RELAX the lower back. Once I figured that out I could rotate my hips. It also required that I change my pedaling style, how my muscles engaged through the stroke... I wonder if that is something that is often missed? Because unless I do that, going low is nothing but painful.

I think a lot of riders get habituated to a pedal stroke that requires an open position and a tense back... really bracing with the back muscles on the downstroke. I know that was the case with me. It was impossible to go low for any length of time until I changed that.


I think I have same the problem.. but on my road bike. When I rotate my pelvis forward, my back is trying to pull me in to a postieor tilt still.

Use to have the saddle high and forward caused me to posterity tilt and flex at the low back excessively I have developed my lower spinal erectors from that bad position.. Now I have kinda figured out I needed more setback and lower saddle to rotate the pelvis more forward to line out the low back.. Breathing is so much better in this position too. My low back is still trying to flex but I do have the ability to rotate my pelvis forward much easier since Ive used a selle smp. I use to be umcomfy on every saddle. So thats what probably made me posterior tilt so I can sit on the sit bones better. Selle smp has been the best saddle by far.

Here is a video of me rotating the pelvis, I feel when I do rotate I feel a bit restricted in the hips at the top of the pedal stroke I can only keep it there for a while but not when im putting power out, I feel I have to flex at the spine

Anyone know what changes can help me relax my low back?

https://www.youtube.com/watch?v=0BiCpRbDauM

Anyone good for road positioning?
Quote Reply
Re: Death of Long and Low Geometry [SamYO] [ In reply to ]
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There are plenty of great bike positioning coaches and their services can usually be had for less than the price of a single very cheap alloy wheel. Think of how good a bargain that is!

I would suggest you ask Slowman for the name of a fitter in your area. Get someone who's invested in learning the craft, and maybe even someone who discusses his art openly with the community. But definitely get a good fitter.

AndyF
bike geek
Last edited by: AndyF: Oct 26, 14 14:13
Quote Reply
Re: Death of Long and Low Geometry [jakob1989] [ In reply to ]
Quote | Reply
jakob1989 wrote:
Jim@EROsports wrote:
...Andy is also correct - when you angle the arms up properly, it's almost 10 watts for everyone. ...


that is great to know as I am trying just that with my new bars.
I changes from the planet x bars with s-bends to a integrated vision bar with l-bends and naturally grab the l-bends at the very top around the shifter.

but now the problem I am having is that the pads are no longer parallel to my forearms resulting in pressure points at the bottom edge of the pads.
now I think about cutting some shims to glue between the armrests and pads. has anyone done something like that or would that result in too much sliding backwards as the pads are no longer horizontal.

jakob

You need to be able to angle both the pads and the extensions together for proper support. It's better just to angle the entire bar if you can't adjust the extensions and pads independently of the base bar. I haven't come across a bar yet that we haven't seen some positive results with drag-wise. Not as good as keeping the base bar level, but we still end up with a net gain. Of course, the moment I say that, I'll test someone for whom it's slower!

Jim Manton / ERO Sports
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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In Reply To:
Of course, the moment I say that, I'll test someone for whom it's slower!


I can send you data on 1 person where it didn't work. Another where it's not better, but for the most part we found the same thing in the tunnel when we went.

Brian Stover USAT LII
Accelerate3 Coaching
Insta

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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Jim@EROsports wrote:
Andy is also correct - when you angle the arms up properly, it's almost 10 watts for everyone. Even when we angle up an entire bar like the TriRig, we see enough of a net gain to make it worth hurting the shape of the bar. In the end, it's about getting the athlete in the best position because you'll see far more gains from that than anything a frame will give you.

So what you are stating here is that tilting the alpha bar up just a bit to achieve a higher hand position (mantis-esque) is worth it in the net +/- cda game? Is that with the 16* rise extensions that come with the bar?

Given the "problem" with integrated base bars (more specifically their non pitch adjustable 22.2 inserts) as well as the ventus, alpha, USE tula, etc, I've spoken with a manufacturer about producing 22.2 carbon extensions that allow for mantis positioning without sacrificing (in the case of the 31.8 bars) base bar angle. Would this higher hand position while maintaining flat base bar be even more beneficial or lead to what Dave alluded to when he said a single blob with a slightly more aero bottom part of the blob or would this allow for the hand blob and the aero base bar blob?

36 kona qualifiers 2006-'23 - 3 Kona Podiums - 4 OA IM AG wins - 5 IM AG wins - 18 70.3 AG wins
I ka nana no a 'ike -- by observing, one learns | Kulia i ka nu'u -- strive for excellence
Garmin Glycogen Use App | Garmin Fat Use App
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Re: Death of Long and Low Geometry [desert dude] [ In reply to ]
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desert dude wrote:
In Reply To:
Of course, the moment I say that, I'll test someone for whom it's slower!



I can send you data on 1 person where it didn't work. Another where it's not better, but for the most part we found the same thing in the tunnel when we went.
I've had cases where the tilt netted out to zero gain, possibly worse, whether it was due to the increases in base bar attack angle I can't say. I put forearm angle in the basket of things definitely worth trying where you have the equipment suitable for testing but I don't expect anything better than an even chance of demonstrating an improvement in either aero or performance.
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Re: Death of Long and Low Geometry [desert dude] [ In reply to ]
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desert dude wrote:
In Reply To:
Of course, the moment I say that, I'll test someone for whom it's slower!



I can send you data on 1 person where it didn't work. Another where it's not better, but for the most part we found the same thing in the tunnel when we went.

Yeah, sorry, I worded that incorrectly. What I meant was we haven't seen a base bar yet penalize the athlete beyond the gains we've seen. We've been lucky so far on that every time we've angled a base bar, the change has resulted in positive gains but, yes, not everyone sees a gain from upturned forearms.

Jim Manton / ERO Sports
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Wouldn't you say that SuperDave's observation about aero risers sheds some light on which riders are most likely to gain from angling the forearms up, though?

AndyF
bike geek
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Re: Death of Long and Low Geometry [AndyF] [ In reply to ]
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I can't think of anyone we've tried this on lately that had any kind of significant risers. You know, maybe because the frames are too tall and they don't need them! ;-)

Jim Manton / ERO Sports
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Jim@EROsports wrote:
I can't think of anyone we've tried this on lately that had any kind of significant risers. You know, maybe because the frames are too tall and they don't need them! ;-)

Haha... good one! :-)

AndyF
bike geek
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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Jim@EROsports wrote:
I can't think of anyone we've tried this on lately that had any kind of significant risers. You know, maybe because the frames are too tall and they don't need them! ;-)
This is a perennial problem I see, unable to actually test a position suitably low enough at the front because riders' bikes are already slammed. Then when the front of bike is low enough, it's often a fraction too short for the rider.

I do so hate having to swap out pad risers though. Far more convenient to test with simple stem spacers.
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Re: Death of Long and Low Geometry [Jim@EROsports] [ In reply to ]
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angling the bars up is not an option with the integrated vision bars (I bet those bars are every fitters dream ;-) ) but since I like grabbing the top of the l-bends that would not work anyway as that would increase the arm angle as well. like this it is at 10° which feels good and is in the range you saw good results right?

but being an engineering student with excess to the machine shop it wasn't too hard to build an angled spacer. I also wanted to get a little higher anyway so I included 5mm of raise. The pads only required a little widening of the holes to accumulate with angled screws.

It feels a lot better now (pressure wise) but I haven't taking it to the road yet. Also I might keep the planet-x pads as they have a bit more lateral support compared to the vision ones.

http://www.directupload.net/...790/4gg39yp7_jpg.htm

also I just bought a 2nd hand P4 frame which should fit very well. build up with these bars and the wheels I already have (H3 and comete disc) I don't think I am giving up much to a superbike anyway
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Re: Death of Long and Low Geometry [Nick B] [ In reply to ]
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http://www.slowtwitch.com/...men_-_bike_4728.html

How many guys over 6 feet tall riding small and medium frames?

If a guy that is 6'1" rides a small, what does a guy that is 5'6" ride.

Ironman Certified Coach

Currently accepting limited number of new athletes
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Re: Death of Long and Low Geometry [Jim Martin] [ In reply to ]
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looking at most of those pics i'd say lots of them need more reach. but then i'm a huge long and low fan. They size down to get stack low enough. FWIW i'm still on a 58 P3C at 6'2 with zero stack and 140mm stem and no pad rise. can't really move to any other frame!

36 kona qualifiers 2006-'23 - 3 Kona Podiums - 4 OA IM AG wins - 5 IM AG wins - 18 70.3 AG wins
I ka nana no a 'ike -- by observing, one learns | Kulia i ka nu'u -- strive for excellence
Garmin Glycogen Use App | Garmin Fat Use App
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Re: Death of Long and Low Geometry [MarkyV] [ In reply to ]
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Yep, stack rules all, and when you are short, with these new frames, you can't get low enough.

Ironman Certified Coach

Currently accepting limited number of new athletes
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