|The Corsa CX has proved successful in road races all over the world, but the EVO version is bound to even greater success. With a handmade tubular structure for superior performance and comfort, it has a latex inner tube that increases its elasticity and puncture resistance. Further features are the Kevlar SiO2 3D Compound with added silica - for reduced rolling resistance and better grip in the wet. 42mm removable valve core. 700c x 23mm.