Rizoma 3D Clutch Lever Black for BMW S 1000 R 14-20/S 1000 RR 09-15Aerodynamics and grip. The 3D levers were developed through in depth wind tunnel testing and analysis. When used at high speeds (e. g. on racetracks), the resulting air pressure can have a significant impact on the braking circuit. To reduce this effect the outer tip of the lever has been hollowed to minimize this pressure and optimize performance. Made of anodized billet aluminum, these levers provide plenty of scope for adjustment as they move on