JT SPROCKETS JTA215.55RED : JT SPROCKETS Aluminium Ultra-Light Self-Cleaning Rear Sprocket 215 - 420 €28.69
AFAM 3039859 : AFAM Chain Kit 520MX6 12/50 Reinforced - Ultra-Light Hard Anodized Rear Sprocket €133.11
AFAM 48011028 : AFAM Chain kit 520XRR3 14/50 Reinforced - Ultra-light Self-cleaning rear sprocket €157.14
AFAM : AFAM Chain kit 520XSR 15/43 Super-Reinforced - Ultra-light Hard anodized rear sprocket €177.03
RENTHAL 481340 : RENTHAL Chain Kit 520R3 13/51 Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €265.26