*Tour Aero Bike Tests*

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Yoln
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by Yoln

X5SAE wrote:
Thu Jun 06, 2024 7:42 pm
Yoln wrote:
Thu Jun 06, 2024 7:16 pm

Reading between the lines "Factor is a German company and we don't like to post fake numbers, so it's better for everyone to not test the Ostro".
They're british...
I'll see myself out...

I'm the process I also learned that Rose was a German brand (which I always assumed to be British...)
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Roadrocket
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by Roadrocket

Have the tour tested any time trial/triathlon bikes?
Even some older 5-10yr test would be great to see

teakay
Posts: 37
Joined: Sat Dec 08, 2007 4:57 pm

by teakay

pmprego wrote:
Mon Apr 08, 2024 10:03 pm
TobinHatesYou wrote:
Mon Apr 08, 2024 9:11 pm
teakay wrote:
Mon Apr 08, 2024 9:04 pm

Won't going beyond 35mm wide effect Chainring size? My CX bike is limited with the stays interfering beyond a certain chainring sizes. The speeds are so high at Roubaix these days you need sufficient gearing. Srams 10spd cog opens things up but it isn't the most efficient way to go and wider Q factors can come an aero penalty. I expect the rims would get deeper to account for the wider tyres aerodynamically and therefore stiffer negating some of the benefits - there must be a tipping point where the gains don't match the losses.

They can do solid carbon yokes like on the Diverge STR. They can do raised or dropped chainstays as well as increasing chainstay length altogether. I am not as confident that we will see 45s. 38s sure, someone will try it. Wiebes was already on 35mm Mondos on Saturday.
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Nohands83
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Location: Leeds, UK

by Nohands83

Roadrocket wrote:
Fri Jun 07, 2024 7:54 pm
Have the tour tested any time trial/triathlon bikes?
Even some older 5-10yr test would be great to see
I don't know if they have but the consensus in the UK TT community (who have done a lot of aero testing) is that Cervelo P3 / P5 or Trek speedconcept are the fastest - even today.

WouldLikeToBeLighter
Posts: 54
Joined: Thu Feb 13, 2020 8:59 pm

by WouldLikeToBeLighter

Nohands83 wrote:
Thu Jun 13, 2024 11:38 am
Roadrocket wrote:
Fri Jun 07, 2024 7:54 pm
Have the tour tested any time trial/triathlon bikes?
Even some older 5-10yr test would be great to see
I don't know if they have but the consensus in the UK TT community (who have done a lot of aero testing) is that Cervelo P3 / P5 or Trek speedconcept are the fastest - even today.
I went from a P5 to a Shiv. I achieved a CdA of 0.1966 on the P5 after testing. The Shiv was set up exactly the same as the P5, the only changes were wheels as the Shiv was disc. The initial run on the Shiv gave a CdA of 0.1925 and further adjustments gave a CdA of 0.1882.

The Shiv weighed a good kilo less than the P5 did and actually brakes quite a lot better, so a few seconds made up on a TT from both of those too.

All that said, I think TT bikes reached peak aero a while ago, so it comes down to things like weight, handling, internal storage etc. now.

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Nohands83
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Location: Leeds, UK

by Nohands83

[/quote]

I went from a P5 to a Shiv. I achieved a CdA of 0.1966 on the P5 after testing. The Shiv was set up exactly the same as the P5, the only changes were wheels as the Shiv was disc. The initial run on the Shiv gave a CdA of 0.1925 and further adjustments gave a CdA of 0.1882.

The Shiv weighed a good kilo less than the P5 did and actually brakes quite a lot better, so a few seconds made up on a TT from both of those too.

All that said, I think TT bikes reached peak aero a while ago, so it comes down to things like weight, handling, internal storage etc. now.
[/quote]

I guess like most things aero it's very personal, my antidote was based on conversations I've had with Xav from Aerocoach and Dan Bigham. If you look at what most of both of their team riders ride it's normally a Cervelo P3/5.

Agree on peak TT bike, sadly mine is hung up unused in the garage nowadays as I stopped racing a couple of years back. Got my Cda down to around 0.185 on my P3 which was pretty decent considering I'm 184cm and 80kg.

GrassQ
Posts: 313
Joined: Thu Jul 13, 2023 5:18 pm

by GrassQ

In New-ish Aeroad 2025 discussion are Canyons windtunnel test between new aeroad 2024, old aeroad, cervelo S5 and Tarmac SL8.
Test has done in GTS-windtunnel (same as Tour used) and with Canyons own leg dummy.
Canyon shows the whole aerocurve, and there can see differences between those bikes in different yaw angles (in Canyons protocol/leg dummy)

gloscherrybomb
Posts: 155
Joined: Mon Jan 21, 2019 5:55 pm

by gloscherrybomb

Yoln wrote:
Thu Jun 06, 2024 8:34 pm
X5SAE wrote:
Thu Jun 06, 2024 7:42 pm
Yoln wrote:
Thu Jun 06, 2024 7:16 pm

Reading between the lines "Factor is a German company and we don't like to post fake numbers, so it's better for everyone to not test the Ostro".
They're british...
I'll see myself out...

I'm the process I also learned that Rose was a German brand (which I always assumed to be British...)
You can't even buy Rose in the UK since Brexit. They're based in Bocholt right on the Dutch border.

DoesMyBikeLookFat
Posts: 12
Joined: Tue Jan 16, 2024 3:55 pm

by DoesMyBikeLookFat

GrassQ wrote:
Thu Jul 18, 2024 9:00 pm
In New-ish Aeroad 2025 discussion are Canyons windtunnel test between new aeroad 2024, old aeroad, cervelo S5 and Tarmac SL8.
Test has done in GTS-windtunnel (same as Tour used) and with Canyons own leg dummy.
Canyon shows the whole aerocurve, and there can see differences between those bikes in different yaw angles (in Canyons protocol/leg dummy)

https://d21buns5ku92am.cloudfront.net/6 ... a4768e.pdf

For the curious

208
Posts: 325
Joined: Wed Apr 26, 2023 6:57 pm

by 208

Curious about that big gap between front tyre and downtube. Always thought that wasn't the most aero approach, must work for them in their case.

Would be cool if the pace bar had handle modules down to 35 or 33.

spartan
Posts: 1813
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by spartan

canyon testing on the new aeroroad. mmm the number match tour mag . sl8 209 watts.
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Screenshot 2024-07-18 194545.png
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EtoDemerzel
Posts: 325
Joined: Sun Dec 17, 2023 4:13 pm

by EtoDemerzel

Image
Would be interesting to see all the details of the testing.
I'm surprised to see the S5 do relatively poorly. It's a pure aero bike, always assumed it was faster than all of these.
Attachments
Screen Shot 2024-07-18 at 5.29.05 PM.png

cajer
Posts: 732
Joined: Sun Jul 14, 2013 1:26 am

by cajer

I would hope the data doesn't match the Tour data as they didn't test with bottles here. Also the S5 would likley perform a bit better relative to the aeroroad if they added a bottle. As the aeroroad down tube does not flare at all for a bottle.

The other question is what verison of the S5 was tested here and additional information on the sizes, bars, and spacers used on the bikes.

spdntrxi
Posts: 6013
Joined: Sat Jul 20, 2013 6:11 pm

by spdntrxi

cajer wrote:
Fri Jul 19, 2024 1:35 am
I would hope the data doesn't match the Tour data as they didn't test with bottles here. Also the S5 would likley perform a bit better relative to the aeroroad if they added a bottle. As the aeroroad down tube does not flare at all for a bottle.

The other question is what verison of the S5 was tested here and additional information on the sizes, bars, and spacers used on the bikes.
hell which version of the old aeroad did they test. I swear I've seen between 202-206 or something.
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cajer
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Joined: Sun Jul 14, 2013 1:26 am

by cajer

the 202 number I believe was with 62mm vs 50mm wheels and also 23/25mm tires vs 25/28

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