RENTHAL 482336 : RENTHAL Chain Kit 420R1 13/47 Standard - Ultra-Light Self-Cleaning Rear Sprocket €127.53
AFAM 48010713 : AFAM Chain kit 520MR2 11/42 Standard - Ultra-light Hard anodized rear sprocket €96.10
AFAM 48010150 : AFAM Chain Kit 520XSR 15/43 Super-Reinforced - Ultra-Light Hard Anodized Rear Sprocket €176.69