A'ME Clamp-On MTB 1.3 Tri grips are composed of Vulcathane, a specially blended rubber compound combined with UV stabilizing ingredients that exhibit superior oxidation and ozone resistance Will not absorb moisture, deteriorate, harden or become slick with age, all the while providing and maintaining superior comfort The 1.3 design features our popular raised A'ME triangle pattern in a large diameter grip for riders who would like more cushion or have large hands Proprietary blend of TPR rubber compound and Vulcathane promotes better control under any condition Installation is simple with a single clamp-on design just slide the grip onto your handlebar and tighten one screw Low profile design eliminates hand fatigue Length 136mm Diameter 33mm Lock On Low profile design eliminates hand fatigue 1.3 design features our popular raised A'ME triangle pattern in a large diameter grip