D.I.D 485584 : DID/REN Chain Kit 520ERT3 13/50 Racing - Ultra-Light Self-Cleaning Rear Sprocket €137.55
AFAM 48010268 : AFAM Chain Kit 420MX2 13/51 Standard - Ultra-Light Self-Cleaning Rear Sprocket €97.48
AFAM 48011538 : AFAM Chain Kit 520XRR3 12/50 Reinforced - Ultra-Light Hard Anodized Rear Sprocket €145.49