AFAM 48011540 : AFAM Chain Kit 520XRR3 13/52 Reinforced - Ultra-Light Hard Anodized Rear Sprocket €147.20
AFAM 3038466 : AFAM Chain Kit 520MX6 14/49 Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €138.94
D.I.D : DID/JT Chain Kit 520ERT3 13/50 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €105.68