PBR FR SPROC 520 STEEL NFR 2172, 16

PBR developed an innovative line called RSS (Rubber Sprocket System) for 18NC front sprockets:  exceptional noise absence thanks to the rubber injected in the holes created on the front sprocketcombination of very high robustness and fluidity durable injected rubber avoids ungluing problems high reliability in intensive usage & many kilometersavailable for sport, street and big capacity offroad motorbikes