The throttle side of this electronic throttle grip features a forged internal gear interface into the grip''s aluminum sleeve so it will never break or disengage from the module''s gear interface. The machined end cap is removable to making the replacement of the rubber sleeve fast and easy. The Biltwell Alumicore grips are not your average classic or retro grip set. These are high quality modern design and functional grips with durable UV resistant TPV rubber for a soft comfortable feel that is not tacky. The rubber sleeve is color-interchangable. The grip core is manufactured from CNC lathe turned quality 6061-T6 aluminum tubing with a knurled texture finish. The TPV rubber sleeve is installed over the knurled aluminum and provides excellent grip. The clutch side features an internal wedge system that grips the inside side of the bar and eliminates grip slip. Note: Into a different color? Color-interchangeable grip sleeve sets are available as 576321 Black; 576322 White; 576323 Oxblood; 576324 Chocolade and 576325 Gray.