AFAM 48010842 : AFAM Chain Kit 520XLR2 13/49 Standard - Ultra-Light Self-Cleaning Rear Sprocket €139.64
AFAM 48011529 : AFAM Chain Kit 520XRR3 13/52 Reinforced - Ultra-Light Hard Anodized Rear Sprocket €146.51
AFAM 484420 : AFAM Chain kit 520XRR3 13/50 Reinforced - Ultra-light Self-cleaning rear sprocket €152.33