AFAM : AFAM Chain kit 525XHR3 16/42 Super-Reinforced - Ultra-light Hard anodized rear sprocket €223.31
JT DRIVE CHAIN 481427 : JT Chain Kit 520HDS 13/51 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €68.58
D.I.D 3028007 : DID/JT Chain kit 525ZVM-X2 15/42 Super-Reinforced - Ultra-light rear sprocket €162.43