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semi aero 700c rims
Been following the thread on rims and was wondering what everyone's thoughts
are on semi-aero rims such as mavic cxp33 and velocity aeroheads. Any real aero advantages? What about the aerohead(19.5mm) vs. cxp33(23.5mm) sidewalls? The aeroheads are much cheaper and lighter too. Thanx in advance. andy |
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semi aero 700c rims
"andy" trifox13atcovaddotnet wrote in message ervers.com... Been following the thread on rims and was wondering what everyone's thoughts are on semi-aero rims such as mavic cxp33 and velocity aeroheads. Any real aero advantages? What about the aerohead(19.5mm) vs. cxp33(23.5mm) sidewalls? The aeroheads are much cheaper and lighter too. Thanx in advance. andy I recently bought some Aeroheads and I really like them. I like the offset rim for the rear. I have Conti tyres on and it's a great combo. Marty |
#3
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semi aero 700c rims
In article rs.com,
trifox13atcovaddotnet says... Been following the thread on rims and was wondering what everyone's thoughts are on semi-aero rims such as mavic cxp33 and velocity aeroheads. Any real aero advantages? What about the aerohead(19.5mm) vs. cxp33(23.5mm) sidewalls? The aeroheads are much cheaper and lighter too. Thanx in advance. No real aero advantages unless you use less spokes. -------------- Alex |
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semi aero 700c rims
Andy wrote:
Been following the thread on rims and was wondering what everyone's thoughts are on semi-aero rims such as mavic cxp33 and velocity aeroheads. Any real aero advantages? What about the aerohead(19.5mm) vs. cxp33(23.5mm) sidewalls? The aeroheads are much cheaper and lighter too. Thanx in advance. andy No significant aero advantages either way. CXP33 is slightly heavier due to the small nipple cradling castings that are held by the spoke holes with the "spring material" that is between the inner and outer rim walls. I have built both. CXP33 is slightly easier to build because you can just drop the nipples in the spoke holes, but the OCR version of the Aerohead gives it a durability edge for rear wheels. You can also get Velocity Aerohead rims without machining on the brake surface. My experience is limited to a couple of samples, but I like the option of not having any material removed by a machine that will effect the life of the rim in use. If you want aero advantages, use Velocity Deep V, fewer spokes, and get wind tunnel tested for aero riding position. -- |
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semi aero 700c rims
daveornee wrote:
CXP33 is slightly easier to build because you can just drop the nipples in the spoke holes... That's a nice feature. The Aerohead has no eyelets or ferrules, and the nipple is easily lost in the rim. Of course, it's pretty easy to get out, but it's a bit of a pain in the butt. ...but the OCR version of the Aerohead gives it a durability edge for rear wheels. I build an Aerohead OCR rear wheel a few weeks back. That offset spoke bed makes the rear wheel much easier to build. I can't give an opinion on durability since I haven't ridden them for very long. You can also get Velocity Aerohead rims without machining on the brake surface. My experience is limited to a couple of samples, but I like the option of not having any material removed by a machine that will effect the life of the rim in use. Yes, you can get the Aerohead without machined sides. And you can get them powdercoated instead of anodized. But you can't get them with both of these features. That is, the powdercoated walls all have machined sidewalls. Or so I was told. I guess it makes some sense, since I don't think the brakes would work very well as long as the powdercoating was still on the sides. They also don't have welded joints. I like that because it should be cheaper and I don't see the advantage of welding. The powdercoated versions come in red, yellow or blue. I don't like that, since I like to keep the rims pretty low-key so they can be used on different bikes. -- Dave, who has yellow rims dvt at psu dot edu |
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