Schwalbe rock razor evo mtb tyre super gravityfor the first time we brought a real semi slick to the gravity and enduro scenes its a very interesting option especially on the rear wheel and for very fast dry trails there is no better tire for low rolling resistance than rock razor triple star compound mtb our best and most sophisticated compound triple compound perfectly adapted to the specific purpose trailstar enduro freeride compoundeasy rolling base layer basegrippy center