If you want stable, aerodynamic ride quality from Shimano's Dura Ace wheel lineup, the C35 Carbon Clincher Wheelset is for you. The C35's weight is centered at the hubs to reduce rim and rotational weight. Combined with the aerodynamic 35mm rim depth, this wheelset gets up to speed faster than others and requires less effort to stay there. Shimano's angular contact bearings have a unique shape that allows them to be pushed as far outboard as possible. This makes the wheels capable of holding higher spoke tensions for a more agreeable ride quality. The C35 features Shimano's widest hub flanges ever, drastically increasing torsional and lateral rigidity, and guaranteeing maximum power transfer to your wheels. This Carbon Wheelset gets Shimano's OptBal 2:1 spoke lacing pattern. When examining spoke pull at the rear wheel, you'll notice that, under load, the non drive side spokes pull twice as hard against the drive side spokes. So, Shimano changed the ratio of spokes between the sides. Now, the rear drive side features 21, three cross stainless steel spokes, while the non drive side has 7 radial laced spokes. This shift in the spoke ratio creates a perfect balance while force is being applied. The wheels still use just as many driving spokes as a 28 hole wheel, but with greater efficiency, balance, and weight savings. And to support this new system, the C35 uses an offset rim to reduce severity of the spoke angle on the drive side to increase lateral rigidity. The C35 wheelset uses ultra stiff, oversized A7075 alloy axles and a quick engaging titanium freehub body for even more efficiency. For braking, the wheels feature an aluminum brake track for a predictable stopping power that won't overheat the rim. Altogether, each component of the wheel has been designed as a symbiotic system for the ultimate in aerodynamics, efficiency, and pure speed.