This is the ultimate, every day aero wheel. The EC90 Aero is fast enough to win time trials, stable in windy triathlons and untouchable in long breakaways. This is the first and only zero compromise carbon fiber road clincher to feature wind cheating aerodynamics. The EC90 Aero Clincher combines the unbeatable braking performance of Eastons proprietary ThermaTec brake track providing smooth, easily modulated braking power with a fiercely fast 56 millimeter tall rim.In addition to the tall rim profile, EC90 Aero wheels feature a low spoke count 18 front 20 rear and hidden spoke nipples tubular only providing a significant, wind cheating advantage. Best of all these wheels offer dependable handling in a variety of conditions. Thanks to their depth and durability, the EC90 Aero has also become a favorite of cyclocross racers as well as classics veterans like George Hincapie Team BMC Racing. Sealed R4 SL hubs with alloy axles, alloy freehubs and ceramic bearings round out the package on these top notch race wheels. Like every Easton wheel, the EC90 Aero is entirely hand built and acoustically tuned in Eastons own factory.The EC90 Aero is the only carbon clincher rim to survive tests in our laboratory for impact and fatigue resistance as well as our brake track torture test, handling temperatures up to 500 degrees F. Every EC90 Aero is entirely hand built and acoustically tuned in Eastons own factory.