RENTHAL 224U-520-53GPOR : RENTHAL Aluminium Ultra-Light Self-Cleaning Rear Sprocket 224U - 520 €90.92
D.I.D : DID/JT Chain Kit 520ERT3 13/50 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €106.99
AFAM : AFAM Chain kit 520XSR 17/43 Super-Reinforced - Ultra-light Hard anodized rear sprocket €183.20
JT DRIVE CHAIN 484266 : JT Chain Kit 520HDS 13/48 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €67.04