AFAM 48011621 : AFAM Chain Kit 520XLR2 14/50 Standard - Ultra-Light Self-Cleaning Rear Sprocket €139.64
AFAM 3039869 : AFAM Chain Kit 520MX6 10/42 Reinforced - Ultra-Light Hard Anodized Rear Sprocket €124.16
D.I.D : DID/JT Chain Kit 520ERT3 14/48 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €99.11