AFAM : AFAM Chain Kit 428MX 12/50 (OEM Ratio) Super-reinforced - Aluminium Ultra-Light Rear Sprocket €116.33
D.I.D : DID/PBR Chain Kit 420D 14/51 (No OEM Ratio) Standard - Aluminium Ultra-Light Rear Sprocket €56.57
D.I.D 483604 : DID/JT Chain Kit 520ERT3 13/50 Racing - Ultra-Light Self-Cleaning Rear Sprocket €106.99
AFAM 48012558 : AFAM Chain Kit 520XSR 16/47 Super-Reinforced - Ultra-Light Hard Anodized Rear Sprocket €183.53