It took Easton composites design, engineering and testing to create the first no compromises carbon road clincher. The EC90SLc offers braking performance and durability on par with traditional aluminum clincher wheels, but with the reduced weight and enhanced stiffness that only a carbon rim can offer.Exclusive ThermaTec brake track treatment provides smooth, easily modulated braking power and reduces heat build up under heavy braking. Easton composites engineers have created a 38mm deep carbon rim with superior impact resistance. Unlike other carbon clinchers, the entire EC 90SLc rim is molded into its final shape in one process, ensuring superior strength. The EC90SLc 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 EC90SLc is entirely hand built and acoustically tuned in Eastons own factory.