D.I.D : DID/JT Chain Kit 520ZVM-X 15/43 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €145.35
D.I.D 484747 : DID/PBR Chain Kit 520ERV7 16/44 Racing - Ultra-Light Hard Anodized Rear Sprocket €240.87
AFAM : AFAM Chain Kit 428XMR 13/53 (No OEM Ratio) Super-reinforced - Steel Standard Rear Sprocket €96.81
RENTHAL 482346 : RENTHAL Chain Kit 520R1 13/48 Standard - Ultra-Light Self-Cleaning Rear Sprocket €218.29