AFAM 48012003 : AFAM Chain kit 520MR2 10/42 Standard - Ultra-light Hard anodized rear sprocket €97.48
D.I.D 48010838 : DID/PBR Chain Kit 520ERT3 13/51 Super-Reinforced - Ultra-Light Rear Sprocket €107.18
AFAM 48010956 : AFAM Chain Kit 520XRR3 13/53 Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €160.23