Login required to started new threads

Login required to post replies

Prev Next
Re: 2014 Speed Concept? [bobby11] [ In reply to ]
Quote | Reply
bobby11 wrote:
wishful thinking, I guess.

sorry bobby, but inasmuch as they decided to go our direction on geometry (among other things) with the P5, we're pretty sure we got it right the first time. maybe you can be Boardman buddies with Nick_Barkley? your A7's will roll just as fast regardless :-)

Carl Matson
Quote Reply
Re: 2014 Speed Concept? [tgarson] [ In reply to ]
Quote | Reply
tgarson wrote:
Wow. The CLM 296 still has some retro-funk going on but the PVK 296 looks shockingly modern to me. The front end looks so much like a Felt Bayonet (in truth it's the other way around) that it's shocking to me. The slight bend in the downtube really reminds me of the 2011 DA prototype that had the bend before they removed it in the production model.

And to think, I thought Cervelo invented aero. /pink
the ti clm296 looks like the frame alex zuelle road to TdF 1996 prologue victory in s'hertogenbosch (spelling?)
Quote Reply
Re: 2014 Speed Concept? [DarkSpeedWorks] [ In reply to ]
Quote | Reply
just like the last bike, a 1-1/8" false steerer accessory aka "steer stub" will be available to let you run whatever standard stem and bar setup you want. it's 55mm tall, so your stack adjustment capability will depend on the length of your stem clamp. no aero spacers to go on the stub...in part because we can't account for every possible stem shape you might put on there, and because there's no way to put a good tail on the spacers that wouldn't interfere with either the frame features behind the headtube or the speedbox accessory.

Carl Matson
Quote Reply
Re: 2014 Speed Concept? [Carl] [ In reply to ]
Quote | Reply
any word on the new SC7?
Quote Reply
Re: 2014 Speed Concept? [Epic-o] [ In reply to ]
Quote | Reply
 
Epic-o wrote:
Carl, can you comment on why did you sum both positive and negative yaw values in the yaw angle histograms.


simplification for publishing purposes.

Epic-o wrote:
For the untrained people, an average yaw of 10.6 degrees could mean that pre-stall drag is much more important that what it really is for the overall aerodynamic performance of the bike.

this is, I believe, what TomA was trying to get at over in the P5 data thread as well. we agree that calling out an average value, time-weighted or otherwise, isn't necessarily the best way to go about things, but it does seem to resonate with more people than not...right now...until everyone gets up to the TomA/Epic-o/everyotherSTaeroguru level

Epic-o wrote:
Moreover, I'm pretty sure that there is a degree of asymmetry in those yaw histograms and some design choices can be affected by it. For example, the BB fillet would be more beneficial with NDS apparent wind speeds

indeed, there is some asymmetry, and in our custom race simulation software (team only) we incorporate it...both the real world and tunnel asymmetry. an extreme example of justifying tube shape/orientation decisions on the basis of that asymmetry might be the QR CD0.1 and Illicito. of course, then you have to explain away how bad the performance is when the wind is coming from the other side...

Carl Matson
Quote Reply
Re: 2014 Speed Concept? [Carl] [ In reply to ]
Quote | Reply
Is there any chance you will be offering Ultegra Di2 this Fall? Seems like a big price gap between 9.5 and 9.9 to get into electronic.

2016:
IMFL #12
http://www.bestbikesplit.com
Quote Reply
Re: 2014 Speed Concept? [cyclenutnz] [ In reply to ]
Quote | Reply
cyclenutnz wrote:
Epic-o wrote:
I'm pretty sure that there is a degree of asymmetry in those yaw histograms and some design choices can be affected by it. For example, the BB fillet would be more beneficial with NDS apparent wind speeds


In course modelling I usually find yaw asymmetry. But I use absolute values for making equipment comparisons as the deltas between models fluctuate with asymmetry and I don't want to have to explain every time why 3m/s wind gives a different outcome depending on wind direction. I suspect Trek are applying that minor simplification for the sake of clarity.

More important than the asymmetry is the variation over time. A single point average doesn't tell the story very well when you have negligible wind for the first two hours and it then picks up for the latter part of the race - that bi-modality can markedly increase the value of low-yaw performance, even for slow riders.

you know, when I threw Epic-o's question over the fence to my aero guy Paul I got back almost the same answer. great minds and all that...

Carl Matson
Quote Reply
Re: 2014 Speed Concept? [ridenfish39] [ In reply to ]
Quote | Reply
afraid not

Carl Matson
Quote Reply
Re: 2014 Speed Concept? [jackmott] [ In reply to ]
Quote | Reply
or simply operate at yaw angles experienced by far fewer people than you might think (or wish)...to turn a phrase from earlier in this thread ;-)

Carl Matson
Quote Reply
Re: 2014 Speed Concept? [justkeepedaling] [ In reply to ]
Quote | Reply
justkeepedaling wrote:


At least they're honest


refreshing, isn't it? and naming names too...what's the world coming to?

Carl Matson
Quote Reply
Re: 2014 Speed Concept? [zamm0] [ In reply to ]
Quote | Reply
as of right now...no.

Carl Matson
Quote Reply
Re: 2014 Speed Concept? [jackmott] [ In reply to ]
Quote | Reply
jackmott wrote:
only on one of the two charts.

not clear what the difference is

justkeepedaling wrote:
Lol, Trek's own whitepaper shows the P5-6 as being faster.

At least they're honest

If you read the chart where the SC is generally faster it was done at A2 with the bars normalized to the SHIV tri. This resulted in bars/spacers/pads that likely slowed the bike down since the stack of the SHIV is so freaking tall. Only take away I can see is that P5 is really fast (supposedly faster with rider on) and that the spacers used on the SC are a more aero solution than that of the P5. Truth is you can't really go wrong with either bike. Pick your weapon based on the most likely courses you'll be seeing. For myself, most every race I do is early, not very windy and generally over 25mph unless it is really hilly.



Heath Dotson
HD Coaching:Website |Twitter: 140 Characters or Less|Facebook:Follow us on Facebook
Quote Reply
Re: 2014 Speed Concept? [DFWTri] [ In reply to ]
Quote | Reply
Couldn't say (even if I knew)...if this post is any indication, "Fall" is the timeframe for that group though.

Carl Matson
Quote Reply
Post deleted by paxfobiscum [ In reply to ]
Last edited by: paxfobiscum: Jul 16, 13 13:19
Re: 2014 Speed Concept? [paxfobiscum] [ In reply to ]
Quote | Reply
Ha ha! Mine would small and red if I was about to order one I'm afraid

Developing aero, fit and other fun stuff at Red is Faster
Quote Reply
Re: 2014 Speed Concept? [Carl] [ In reply to ]
Quote | Reply
Sigh. Guess I need to start saving my pennies and research the values for my 2011 SC 9.8
I guess Trek is going to get some more of my $$$.

Primum Non Nocere, except to Kempy!
Quote Reply
Re: 2014 Speed Concept? [SkippyKitten] [ In reply to ]
Quote | Reply
SkippyKitten wrote:
Ha ha! Mine would small and red if I was about to order one I'm afraid

I went with the red.

Favorite Gear: Dimond | Cadex | Desoto Sport | Hoka One One
Quote Reply
Re: 2014 Speed Concept? [Carl] [ In reply to ]
Quote | Reply
Carl,

It does not appear that the new speed concept includes the integrated chain catcher that is on the Madone and Domane. Is there a reason for this, shaping in that area?
Quote Reply
Re: 2014 Speed Concept? [GMAN19030] [ In reply to ]
Quote | Reply
This isn't in reply in particular to you, Gman, but to anyone:

I'm hopefully going to get to play with one this week. Probably wont ride it too much, since its a medium and I'm a large. But, if anyone wants any questions answered/pictures taken/etc, let me know! If they are particularly technical questions, just give me the question and how to measure/gauge/quantify/whatever your answer. Sound good?

----
@adamwfurlong
Quote Reply
Re: 2014 Speed Concept? [3xBAMF] [ In reply to ]
Quote | Reply
100% TT bike, hands down.

Eliot
blog thing - strava thing
Quote Reply
Re: 2014 Speed Concept? [renorider] [ In reply to ]
Quote | Reply
I didn't mean what I said as a slight. I am MASSIVELY impressed that the whitepaper just gives it as it is.

Honesty here wins huge points in Trek's favor here for me, no matter what the data itself indicates. My region is very hilly so most of this means naught to me, but the weight savings are nice.

I was a longtime rider of a Trek Aluminum roadie. And I certainly will be buying a new bike next year. Trek just made a ginormous leap over Specialized on my list.
Quote Reply
Re: 2014 Speed Concept? [afurlong] [ In reply to ]
Quote | Reply
Quote:
I'm hopefully going to get to play with one this week. Probably wont ride it too much...

you could just read about it...

http://www.slowtwitch.com/...t_Makeover_3766.html

no sponsors | no races | nothing to see here
Quote Reply
Re: 2014 Speed Concept? [Carl] [ In reply to ]
Quote | Reply
Carl, just wanted to say hell of a job. Just got our test unit and am really very impressed. The aerobars are such a departure, all good changes. As for the frame, I'll have to get back to you when I get some miles on it. Will have a few specific questions I'd like to ping you later, but going to ride it tomorrow morning.... quite jazzed, and I have a high threshhold for that.

Well done to all y'all. And tell Royce and Michael the Project One colors are electric. Dig it. If I can get signed up, I think I may race it at Solana Beach Tri next weekend, give it a local debut test... it won't be hard to spot.

Jay Prasuhn
Marketing Specialist, American Bicycle Group (Quintana Roo//Litespeed//Obed)
twitter.com/jayprasuhn

Quote Reply
Re: 2014 Speed Concept? [Carl] [ In reply to ]
Quote | Reply
hi Carl , cool bike.

i've been staring at the Di2 model in Dan's review. where's the battery mounted? is it under that bb fairing/wing ala the Felt DA?



Quote Reply
Re: 2014 Speed Concept? [dsmallwood] [ In reply to ]
Quote | Reply
They have integrated the internal battery into the seat tube.
Quote Reply

Prev Next