matto
Apr 22, 12 19:41
Views: 1638
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Re: Faster Disc Covers on different wheels? [desert dude]
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Actually I have a theory here... That a wider rim, like an A23, with a cover might be almost or as good or better than the 808 w/cover results.
If you look wheelbulider's aero data (http://www.wheelbuilder.com/...e/aerodisc-data.html), the 30mm wheel they used was a DT Swiss RR 585, which is a narrow rim. At 0-yaw it was at a 20+ gram deficit to all the other main contenders, and I'm guessing this is because of the tire bulge from the narrow rim. I have a kinlin 300 with disc cover (similar to the RR 585 they tested) an it's an aero mess from the tire to the rim, then back to the cover.
The A23 is 23mm wide and wheelbuilder claims that their covers actually fit the A23 quite nicely and create a smooth transition from the brake track to the cover. My rampant aero speculation is that this wheel would do quite well against the other leaders in that graph. It would also be lighter than the covered deep wheels, and possibly lighter than a Hed disc.
(This post was edited by matto on Apr 22, 12 19:48)
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