150 tpi casing and mtb world cup driven tread compound as the cross evo39s but with an aggressive widely spaced tread knobs to shred mud and grip firmly in acceleration braking and cornering even in the most challenging winter conditions superfine casings give all vittoria39s cross tyres their signature silky ride light weightness for great acceleration great puncture resistance even at low pressures plus a competition derived offroad tread compound no need for compromise now you