AFAM : AFAM Chain kit 520XSR 17/42 Super-Reinforced - Ultra-light Hard anodized rear sprocket €172.56
AFAM : AFAM Chain kit 520XHR2 17/40 Super-Reinforced - Ultra-light Hard anodized rear sprocket €189.70
D.I.D : DID/PBR Chain Kit 520ERT3 12/51 Super-Reinforced - Ultra-Light Self-Cleaning Hard Anodized Rear Sprocket €113.80