D.I.D : DID/JT Chain Kit 520ERT3 14/50 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €102.53
AFAM 483828 : AFAM Chain kit 520XRR3 14/38 Reinforced - Ultra-light Hard anodized rear sprocket €128.34
AFAM 48013059 : AFAM Chain Kit 520XSR 15/42 Super-Reinforced - Ultra-Light Hard Anodized Rear Sprocket €185.61
AFAM : AFAM Chain kit 525XHR3 16/42 Super-Reinforced - Ultra-light Hard anodized rear sprocket €218.16