Rizoma RRC Clutch Lever LCR706B - GoldRizoma RRC Clutch Lever LCR706B Aerodynamics and grip. RRC levers have been 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 entirely from billet aluminum and anodized, RRC levers have a