S&S Cycle Hydraulic Tappets with HL2T Kit 33-5353Feature numerous significant design improvements Larger inner bearing race reduces stresses to increase axle, bearing and roller life. The S&S inner bearing race is . 123 larger in diameter than the raceless roller axles currently used by some manufacturers Improved inner race roller design allows use of more and larger bearings to increase load carrying surface area, further reducing stress and wear in the critical roller area Redesigned plunger