AFAM 48012479 : AFAM Chain Kit 525XSR2 17/45 Super-Reinforced - Ultra-Light Hard Anodized Rear Sprocket €191.42
D.I.D 3029710 : DID/PBR Chain kit 525ZVM-X2 15/42 Super-Reinforced - Ultra-light Hard anodized rear sprocket €260.61