D.I.D : DID/PBR Chain Kit 520VX3 13/50 Standard - Ultra-Light Self-Cleaning Hard Anodized Rear Sprocket €126.58
D.I.D 484580 : DID/REN Chain Kit 520ERT3 13/48 Racing - Ultra-Light Self-Cleaning Rear Sprocket €142.60
AFAM 482743 : AFAM Chain kit 525XRR 16/43 Reinforced - Ultra-light Hard anodized rear sprocket €170.86
AFAM 48012272 : AFAM Chain Kit 520XSR 15/43 Super-Reinforced - Ultra-Light Hard Anodized Rear Sprocket €177.03