Racing zero goes carbon for the first time in 2015 and does it in its own way this is the first wheel on the market that combines a carbon rim and aluminum spokes this new hybrid technology will combine the legendary stiffness of the aluminum racing zero with a much better reactivity thanks to the carbon rim that reduces the peripheral weight and the wheel inertia a really light wheel with superior handling and optimal power transfer the rim a 29mm high carbon rim 17mm wide a wider rim