AFAM 48012279 : AFAM Chain Kit 520XSR 16/44 Super-Reinforced - Ultra-Light Hard Anodized Rear Sprocket €173.59
AFAM 481338 : AFAM Chain kit 520XRR3 14/53 Reinforced - Ultra-light Self-cleaning rear sprocket €160.56
RENTHAL 1540-520-48GPRD : RENTHAL Twinring Aluminium Ultra-Light Self-Cleaning Hard Anodized Rear Sprocket HA - 520 €157.78