Diadora x trivex ii mtb spd shoesdiadoras x trivex ii mtb shoes have comp mtb cr soles for optimum power transmission to the pedals this means that on faster stretches of terrain these shoes transfer power to the pedals evenly and efficiently helping you to maintain a good rhythm without wasting energy these mtb shoes also have a special textured finish on the front which ensures improved cleat attachment featuresclosure dual ring closure sole comp mtb cr composite reinforced sole uppe