AFAM 48012507 : AFAM Chain Kit 530XHR2 17/40 Super-Reinforced - Ultra-Light Hard Anodized Rear Sprocket €234.96
D.I.D 3036015 : DID/PBR Chain Kit 525ZVM-X2 15/41 Super-Reinforced - Ultra-Light Hard Anodized Rear Sprocket €285.29