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Re: Help me make the worlds fastest triathlon bike even better [Allanhov] [ In reply to ]
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Allanhov wrote:
GreenPlease wrote:
Toothengineer wrote:
Same questions I had as well. My CDa is pretty darned low and from what I have been told from reliable sources it’s pretty hard for a male to get down in the 0.17-0.19 range (unless your simply a shorter smaller dude) You could also probably get your CDa down but could be at expense or loss of power thus not making sense and can you even hold that postion over say 4-5 hours. That particular bar I also can’t see be able to get into a good downhill aero tuck in either (but I guess I could be wrong) so your giving up watts on downhills for watts savings on the flats.


You can actually get into an excellent down hill tuck. Just retract the bar and put your hands on the "tops" if that makes any sense. You end up in basically the same position as Kienle's "top tube safe" descent position.


You can actually get in the best possible tuck with the Morf-Tech. Lars Christian Vold, who rides with them, beat my ass in the downhills in Norseman reaching 99km/h while I only hit 93km/h. Then and there I decided that my next bike would have Morf-Tech bars. https://triallan.com/...man-downhill-riding/

Interesting
Basically with the Morftec in config "basebar" you can put your head at the place of the aerobar, and be in very optimal egg position
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Re: Help me make the worlds fastest triathlon bike even better [Allanhov] [ In reply to ]
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Do you swim and run in the trip socks? Or are those "just" compression socks?
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Re: Help me make the worlds fastest triathlon bike even better [Nazgul350r] [ In reply to ]
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Nazgul350r wrote:
Do you swim and run in the trip socks? Or are those "just" compression socks?

They are the Bioracer Aero Tube - https://www.bioracer.com/...ar-concept-aero-tube

Not compression, just aero. I did not try a test without them, as the guys in the tunnel said that people generally test better with them. I had 2 hours in the tunnel and we tested a lot of different things, but stil got short on time.

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Re: Help me make the worlds fastest triathlon bike even better [burnthesheep] [ In reply to ]
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burnthesheep wrote:
Ditch the downtube bottle. Custom top tube storage box extended to be hydration also.

Or, just a better inside the frame bottle.

Invent shoe covers integrated to the shoe with quick zip at back.

Custom length valve extenders with the aero “nut”.

Ratchet rear deraileur and more inboard gearing. Or in a flat course ride single speed. Not sure on losses vs aero of a limited internal hub. Run no FD if flatter.

Sorry, I’m an engineer.

I need one bottle with all my nutrition for 180k (usually the aero bottle on the frame) and I need a place to put a regular bottle that I pick up on aid stations. If I get a front hydration solution I can put water in it and put the bottle as it is emptied in the bottle behind the seat until liter zone. Where should my nutrition bottle go then? Is there another bottle faster than the Xlab TT? BTW, it must be able to see thru as I have control over how much nutrition I have gotten in.

I have thought about making the integrated shoe covers actually, but don't see that happening in the immediate future. Any other solutions?

I got the valve extenders from Enves own tubeless kit. Is it anything to gain by changing that on? The ones one the picture are regular tubes with too long valves as I was not able to put on the tires in time.

Riding 1x was one of my ambitions but I could not get the math together as I am riding hilly races. In Norseman I am a lot of the long uphills on 39/11 and on 53/11 on the downhills. Changing back and forth from race to race seems like a lot of hassle as well, but I don't know as I have never tried it.

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Re: Help me make the worlds fastest triathlon bike even better [GreenPlease] [ In reply to ]
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GreenPlease wrote:
As some others have said, there’s a *chance* you’re giving up a few watts with your pedals/shoes. Pedal/shoe aero is not universal (as I found out at A2) but that doesn’t mean that substantial gains don’t exist.


As for a bike, if you’re going for the absolute fastest setup you likely want to be on either a Speed Concept or a P5.

What helmets did you test?


I tested the following helmets:
  • Kask Mistral
  • LG P09
  • Endura Drag2Zero
  • Giro Airhead taped (ventilation and under the tail)
  • Giro Airhead
  • Specialized S-Works

The list is arranged after performance with only 2 watts difference with Mistral and P09

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Re: Help me make the worlds fastest triathlon bike even better [Allanhov] [ In reply to ]
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Quote:

I need one bottle with all my nutrition for 180k (usually the aero bottle on the frame) and I need a place to put a regular bottle that I pick up on aid stations. If I get a front hydration solution I can put water in it and put the bottle as it is emptied in the bottle behind the seat until liter zone. Where should my nutrition bottle go then? Is there another bottle faster than the Xlab TT? BTW, it must be able to see thru as I have control over how much nutrition I have gotten in.

Matt Hanson has tested a ton of hydration options on his PRSix at the velodrome, and he uses a Torhans VR on his seat tube...I doubt that's by accident, so perhaps another option for you to explore.
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Re: Help me make the worlds fastest triathlon bike even better [Allanhov] [ In reply to ]
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Interesting. What order did you test in? Did you establish equipment first or position first?
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Re: Help me make the worlds fastest triathlon bike even better [STJ_2028] [ In reply to ]
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STJ_2028 wrote:
Quote:

I need one bottle with all my nutrition for 180k (usually the aero bottle on the frame) and I need a place to put a regular bottle that I pick up on aid stations. If I get a front hydration solution I can put water in it and put the bottle as it is emptied in the bottle behind the seat until liter zone. Where should my nutrition bottle go then? Is there another bottle faster than the Xlab TT? BTW, it must be able to see thru as I have control over how much nutrition I have gotten in.

Matt Hanson has tested a ton of hydration options on his PRSix at the velodrome, and he uses a Torhans VR on his seat tube...I doubt that's by accident, so perhaps another option for you to explore.

The Torhans VR is not officially available in Europe and I heard is not very leakproof. It has 590 ml which is about the same as the xlab aero tt has.
I do not know if the cage holds the bottle well at vibrations, the xlab aero tt cage holds alledgedly very good.
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Re: Help me make the worlds fastest triathlon bike even better [Allanhov] [ In reply to ]
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Allanhov wrote:
Nazgul350r wrote:
Do you swim and run in the trip socks? Or are those "just" compression socks?


They are the Bioracer Aero Tube - https://www.bioracer.com/...ar-concept-aero-tube

Not compression, just aero. I did not try a test without them, as the guys in the tunnel said that people generally test better with them. I had 2 hours in the tunnel and we tested a lot of different things, but stil got short on time.

Do you run in them as well? Compressions socks tend to lower on my calves, or are otherwise annoying. Would give this a try, especially if it save me seconds on the bike :)
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Re: Help me make the worlds fastest triathlon bike even better [Allanhov] [ In reply to ]
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Allanhov wrote:
Nazgul350r wrote:
Do you swim and run in the trip socks? Or are those "just" compression socks?


They are the Bioracer Aero Tube - https://www.bioracer.com/...ar-concept-aero-tube

Not compression, just aero. I did not try a test without them, as the guys in the tunnel said that people generally test better with them. I had 2 hours in the tunnel and we tested a lot of different things, but stil got short on time.

Had a look to the site, but impossible to buy (or get a price).

No triathlon product on their webshop, no triathlon products on other sites, no shop 100km around Paris, ...

Funny to develop products and not sell them. Too recent ?
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Re: Help me make the worlds fastest triathlon bike even better [Allanhov] [ In reply to ]
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Is the P09 custom paint? I've been wanting them to make a blacked out version!
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Re: Help me make the worlds fastest triathlon bike even better [STJ_2028] [ In reply to ]
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STJ_2028 wrote:
Quote:

I need one bottle with all my nutrition for 180k (usually the aero bottle on the frame) and I need a place to put a regular bottle that I pick up on aid stations. If I get a front hydration solution I can put water in it and put the bottle as it is emptied in the bottle behind the seat until liter zone. Where should my nutrition bottle go then? Is there another bottle faster than the Xlab TT? BTW, it must be able to see thru as I have control over how much nutrition I have gotten in.


Matt Hanson has tested a ton of hydration options on his PRSix at the velodrome, and he uses a Torhans VR on his seat tube...I doubt that's by accident, so perhaps another option for you to explore.

I also doubt his solution is an accident, but he is sponsored by Torhans and I am not sure what other things he tested or if he did a compromise a small aero gain for a potential economical benefit.

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Re: Help me make the worlds fastest triathlon bike even better [JBell] [ In reply to ]
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JBell wrote:
Is the P09 custom paint? I've been wanting them to make a blacked out version!

No, it is stock and I got it in 2016. A very good helmet btw.

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Re: Help me make the worlds fastest triathlon bike even better [Pyrenean Wolf] [ In reply to ]
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Pyrenean Wolf wrote:
Allanhov wrote:
Nazgul350r wrote:
Do you swim and run in the trip socks? Or are those "just" compression socks?


They are the Bioracer Aero Tube - https://www.bioracer.com/...ar-concept-aero-tube

Not compression, just aero. I did not try a test without them, as the guys in the tunnel said that people generally test better with them. I had 2 hours in the tunnel and we tested a lot of different things, but stil got short on time.


Had a look to the site, but impossible to buy (or get a price).

No triathlon product on their webshop, no triathlon products on other sites, no shop 100km around Paris, ...

Funny to develop products and not sell them. Too recent ?

I have no clue how recent they are, but I got passed on the bike by a very fast guy during Ironman Barcelona with them and knew he was a good bike who knew what he was doing. Therefor I decided to give them a try, but I got them thru their Norwegian distributor.

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Re: Help me make the worlds fastest triathlon bike even better [Allanhov] [ In reply to ]
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I just got the wind tunnel data so now I can reply better to questions. This is my fastest position with a 1-minute average CdA of 0,1748. Measured in the new Boardman Wind Tunnel at 5 degrees yaw.

And yes, the aerobar extentions are too long, but we would not cut them too much before the fit.

.


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Last edited by: Allanhov: Nov 28, 18 8:01
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Re: Help me make the worlds fastest triathlon bike even better [Pyrenean Wolf] [ In reply to ]
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Pyrenean Wolf wrote:
@BW_Tri wrote:
Allanhov wrote:

Btw, my lowest Cda was 0,1748, so it cannot be all bad.


The tunnel you tested at needs to be calibrated.............


Or is it a matter of trade-off "CdA vs sustainable power" ?


The only thing I really changed regarding the position was rasing the arm angle. Does it work over 180k? We will find out in Patagonman 9.December ;)

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Re: Help me make the worlds fastest triathlon bike even better [Allanhov] [ In reply to ]
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That's a very low cda. Eyeballing your fit, normally I would say you should consider adding a bit more reach but it appears that you have a pretty good "shrug" despite having your elbows relatively far back. One thing I would suggest just from a practical/comfort standpoint are the angled armrests from Watt Shop:

https://www.shopforwatts.co.uk/.../dirtyaero-arm-rests
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Re: Help me make the worlds fastest triathlon bike even better [Allanhov] [ In reply to ]
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Thanks Allan for the info and pictures.

Several questions and comments arise :

0) congrats for the result. Impressive !

1) What is the black "thing" below the bars, half round, looks like a water tank ?
Significant impact on CdA ?

2) 0.175 is very very low. The lower CdA I knew for a man is Dan Bigham (now part of Huub Wattbike,) also CdA 0.175
But I guess it was in pursuit config, may be lower than its TT position, and with double disk.
I was expecting for you around .185 at best, with your non-disk wheels and LD may be higher position

3) I'm surprised this CdA is "at 5° yaw". Is CdA calculated relative to full wind speed, or only the "bike direction" component of the wind (x cos (5°))?

4) Did you test with greater reach (so more angled upper arms) ?

Thanks again for sharing.
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Re: Help me make my QR PRsix as fast as possible [Allanhov] [ In reply to ]
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Allanhov wrote:
Any thoughts of how I can make it even faster?

Nothing valuable to add other than to say thanks for sharing, hoping you get some good debate we can all learn from.

Dan
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Re: Help me make the worlds fastest triathlon bike even better [GreenPlease] [ In reply to ]
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he doesn't need angled pads because he hasn't angled his arms

GreenPlease wrote:
That's a very low cda. Eyeballing your fit, normally I would say you should consider adding a bit more reach but it appears that you have a pretty good "shrug" despite having your elbows relatively far back. One thing I would suggest just from a practical/comfort standpoint are the angled armrests from Watt Shop:

https://www.shopforwatts.co.uk/.../dirtyaero-arm-rests

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Re: Help me make the worlds fastest triathlon bike even better [ericMPro] [ In reply to ]
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In my experience, an arm setup like the one he shows in this post (above) would tend to slip down/back. If he had more reach that would not be the case. Just my $0.02
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Re: Help me make my QR PRsix as fast as possible [Allanhov] [ In reply to ]
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Hello Allanhov and All,

I market some items through View-Speed http://www.view-speed.com/ that might help ..... and warrant your consideration ....

With View-Speed Cyclops glasses you can keep a lower head position and still see forward quite well.

It is worth about a 1 mph improvement in the wind tunnel at 20 mph.

The glasses might be illegal for Ironman races (no mirror rule) since a prism is used for forward vision... keeping in mind the intent of the ruling is to prevent a cyclist from using a mirror to see behind ..... to avoid drafting when marshals are near. Should check with race director if entered in an Ironman race before using the glasses.

The View-Speed shoe modification (only with Speedplay pedals) (Measured lowering of drag in San Diego Low Speed Wind Tunnel) and with the crepe sole you can run in them for short distandes.

What stem did you use for the Morf bars? I have a set and I will mount them soon ..... looking at stem choices for a P5.

Which position is faster for descending with Morf bars?





Also what is mounted under the Morf bars on your set up that looks like it would clean up airflow?

Cheers, Neal

+1 mph Faster
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Re: Help me make the worlds fastest triathlon bike even better [Pyrenean Wolf] [ In reply to ]
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Pyrenean Wolf wrote:
Thanks Allan for the info and pictures.

Several questions and comments arise :

0) congrats for the result. Impressive !

1) What is the black "thing" below the bars, half round, looks like a water tank ?
Significant impact on CdA ?

2) 0.175 is very very low. The lower CdA I knew for a man is Dan Bigham (now part of Huub Wattbike,) also CdA 0.175
But I guess it was in pursuit config, may be lower than its TT position, and with double disk.
I was expecting for you around .185 at best, with your non-disk wheels and LD may be higher position

3) I'm surprised this CdA is "at 5° yaw". Is CdA calculated relative to full wind speed, or only the "bike direction" component of the wind (x cos (5°))?

4) Did you test with greater reach (so more angled upper arms) ?

Thanks again for sharing.

1 - It is a 3D printed water bottle created by Morf-Tech. It was neutral regarding aerodynamics in my cases.

2- I cannot guarantuee how correct the numbers in the Boardman tunnel was, but compared to the other pure time trailist they have tested it was right up there with the best ones. Verification will come with the testing with the Notio.

3 - I forgot to ask why they tested at 5 degree yaw, but my bike was position at 5 degree and the wind speed was 45 km/h

4 - I testet full mantis with identical drag and a horrible feeling. See pic



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Re: Help me make the worlds fastest triathlon bike even better [ericMPro] [ In reply to ]
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ericMPro wrote:
he doesn't need angled pads because he hasn't angled his arms

GreenPlease wrote:
That's a very low cda. Eyeballing your fit, normally I would say you should consider adding a bit more reach but it appears that you have a pretty good "shrug" despite having your elbows relatively far back. One thing I would suggest just from a practical/comfort standpoint are the angled armrests from Watt Shop:

https://www.shopforwatts.co.uk/.../dirtyaero-arm-rests

Actually, I feel I would prefer a better support with my elbows. On Friday I will meet up with a guy who can make custom made parts of all kinds of materials. Hopefully he will have some spacers to make the pads level, or cups. We can make other cool things as well :D

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Re: Help me make the worlds fastest triathlon bike even better [GreenPlease] [ In reply to ]
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GreenPlease wrote:
In my experience, an arm setup like the one he shows in this post (above) would tend to slip down/back. If he had more reach that would not be the case. Just my $0.02

I agree. Like I said, we will make a custom made solution to this.

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