AFAM 48011516 : AFAM Chain Kit 520XRR3 12/50 Reinforced - Ultra-Light Hard Anodized Rear Sprocket 145,49 €
AFAM 48012443 : AFAM Chain Kit 520XHR2 17/42 Super-Reinforced - Ultra-Light Hard Anodized Rear Sprocket 203,43 €