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PostPosted: Fri May 25, 2012 7:30 am 
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Why exclude rims narrower than 22mm? Do they, at that width, abruptly become so inefficient that they cannot be considered 'aero'?

Surely you have to include all non-box section rims, regards of width, to get the full picture?


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Posted: Fri May 25, 2012 7:30 am 


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PostPosted: Sun Nov 04, 2012 6:45 pm 
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Nice list. Thanks!

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PostPosted: Mon Nov 05, 2012 5:28 am 
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MattSoutherden wrote:

Given the Enve 3.4 front is 35mm deep, and probably outperforms most 60mm 'aero' rims, old skool is perhaps old hat.

Just sayin' :wink:



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PostPosted: Mon Nov 05, 2012 8:43 am 
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Any Chance the Kinlin XR-300 rim is built onto the Komponentix Aero wheelset tested here? they call the rim the Halo Mercury, but it has the same dimensions and claimed weight as the XR-300.

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PostPosted: Tue Nov 06, 2012 6:22 pm 
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Wal wrote:
Why exclude rims narrower than 22mm? Do they, at that width, abruptly become so inefficient that they cannot be considered 'aero'?

Surely you have to include all non-box section rims, regards of width, to get the full picture?


I don't think that deep narrow wheels are not more aero than box section, but they truly struggle standing up to today's wider wheels. This chart for instance shows a lot of the new wider wheels such as FC 808, Bontrager 7 D3, Mavic's new CXR and their CC80; as well as a Hed Jet 90(20mm brake track) with a 20mm tire.

http://www.slowtwitch.com/articles/imag ... raph_2.jpg

As you can see, the only place that the Jet 90 is competitive is at 0 degrees yaw; at 5 is close and from there out it really isn't with the pack except on the non-drive side it doesn't stall until later than some of the competition.

To give you an idea of how this all compares. I've seen data on the PX 101 rim, where its faster than the old 404 shape over a range of yaw from 0-20. Nowadays, we're seeing the 303 be quite a bit faster than the old 404.

So a well designed 44mm rim can be faster than a non-designed narrow 100mm rim.


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PostPosted: Tue Nov 06, 2012 6:34 pm 
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Boy those D3's are slippery!


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PostPosted: Wed Nov 07, 2012 2:40 am 
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I wrote that post prior to the slow twitch test linked above. Interesting results!

One note also is that the Enve 6.7 clinchers data has also been published/updated on their website. I estimate they are similar to the Bontrager 7 clinchers (depending on tire).

Just saw the post on the Flo 30 wheels. Be interesting to put those head to head with the 3t accelero.

Cheers!

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