Vittoria cross xm pro cyclocross bike tyrefast flexible and flat free no need for compromise in the close season now you can run cross tyres with the same outstanding performance characteristics as your summer race tyres superfine casings give these cross tyres a signature silky ride light weight for great acceleration great puncture resistance even at low pressures plus a competition derived offroad tread compound part of vittorias family of cross racing cross evo xm is for loose terrain