AFAM : AFAM Chain kit 525XHR3 15/41 Super-Reinforced - Ultra-light Hard anodized rear sprocket €205.49
D.I.D 48011585 : DID/JT Chain Kit 520DZ2 14/49 Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €86.16
D.I.D 486944 : DID/PBR Chain Kit 520ERT3 13/50 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €105.16