Carbon Road Bike Wheelse

As you'll probably know, http://www.carbonbikefactory.com/700c-carbon-road-bike-front-wheel-clincher-60mm-12k-matt-novatec-black-spoke-black-p-356.html over the last few years many manufacturers have begun to concentrate on the aerodynamics in the section of the wheel where the rim is leading as well as the section where the tyre is leading. Zipp, for example, have focused on this with their Firecrest designs. Bontrager have done so too; D3 means Dual Direction Design.The result is a 35mm-deep rim http://www.carbonbikefactory.com/700c-carbon-road-bike-wheelset-clincher-60mm-3k-glossy-powerway-white-spoke-black-p-350.html that is much broader than a traditional V-shaped aero rim, with a fairly blunt curve on the spoke side – although not as blunt as Zipp use on their Firecrest wheels. Bontrager's sidewalls don't stay wide as long as Zipp's do. Instead, they gradually curve inwards right from the brake track.

The rims are wide at 27mm, the idea, in Bontrager's own words, being to "reach out and 'catch' the flow that separates off the [23mm] tyre before it can create a massive wake. http://www.carbonbikefactory.com/700c-carbon-road-bike-front-wheel-clincher-38mm-3k-glossy-powerway-black-spoke-white-p-325.html For a full discussion of why the D3 is shaped exactly how it is you should definitely read Bontrager's white paper on the range.According to Bonty, the Aeolus 3 has lower drag than both the 32mm-deep Zipp 202 and the 45mm-deep Zipp 303 at all yaw angles http://www.carbonbikefactory.com/carbon-wheels-road-bike-c-451_472.html (the combined effect of the actual wind and the movement of travel) from 0°to 12.5°, then beyond that the Zipps have a slightly lower drag. http://www.carbonbikefactory.com