AFAM 3038560 : AFAM Chain Kit 520MX6 13/52 Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €143.85
D.I.D 48011074 : DID/PBR Chain Kit 520ERT3 15/48 Super-Reinforced - Ultra-Light Rear Sprocket €108.76
AFAM 3039910 : AFAM Chain Kit 520MX6 13/49 Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €137.78