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Mavic Cosmic Carbone vs. Ksyrium SL's for a duathalon(5 posts)

Mavic Cosmic Carbone vs. Ksyrium SL's for a duathalonFranchise
May 22, 2002 5:39 AM
I'm going to participate in my first duathalon this weekend, and I need some help with wheel choice. I don't know whether to go aero(Carbone's) or to go with a light wheelset(Ksyriums). There is one climb on the course and it is relatively short(less than a mile). The course if 22 miles long. Any suggestions would be much appreciated.
re: Mavic Cosmic Carbone vs. Ksyrium SL's for a duathalonweiwentg
May 22, 2002 5:52 AM
offhand I would have to say the Carbones. is the climb hellishly steep? if it's a steep one, it'll be a close call - the Ks are pretty aero.
re: Mavic Cosmic Carbone vs. Ksyrium SL's for a duathalonThe Flash
May 22, 2002 6:53 AM
Go with the Carbones...Aero is more important...BTW, Ksyriums are NOT aero!
re: Mavic Cosmic Carbone vs. Ksyrium SL's for a duathalonweiwentg
May 22, 2002 6:55 AM
I disagree. they're much more aero than my aeroheads.
Yes, they may be...Wayne
May 22, 2002 7:08 AM
but if you go and look at a site like analyticcycling.com, etc. or do some reading on the subject (yes, people have actually published papers that have analyzed this stuff) you'll find that you need a rim depth of around 35mm (Zipp 303s, not sure about other models) for there to be much of any aero advantage, and you need to get up to around 50mm (like the cosmic carbones or Zipp 404s) for it to get really significant. The other bits I've gathered from reading about this is that it's basically the outer 3 inches or so of the wheel that matter the most for the aerodynamic qualities of the wheel, bladed spokes offer next to no advantage over traditional spokes, and under almost all circumstances except for the steepest of climbs when your going slower than around 12mph does light offer any advantage over aero. So for my money I would think tubular Zipp 404s are the best out there. As aero as can be and lighter than 99% of the other wheels. Also should be stiffer since stiffness increases as the depth of the rim increases, provided it is a structural component of the rim and not just a fairing like the carbones. That being said one article I read said, stiffness is a purely subjective preference, and unless the wheel is flexing enough to rub the brakes doesn't matter.