RENTHAL 486365 : RENTHAL Chain Kit 520R1 13/48 Standard - Ultra-Light Self-Cleaning Rear Sprocket €229.51
JT DRIVE CHAIN : JT/JT Chain Kit 420HDR 12/52 (No OEM Ratio) Reinforced - Steel Standard Rear Sprocket €38.09
AFAM : AFAM Chain kit 520XSR 17/42 Super-Reinforced - Ultra-light Hard anodized rear sprocket €170.85
AFAM 3038393 : AFAM Chain Kit 520MX6 13/50 Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €142.36
D.I.D : DID/PBR Chain Kit 520ERT3 13/52 Super-Reinforced - Ultra-Light Self-Cleaning Hard Anodized Rear Sprocket €118.94