D.I.D : DID/JT Chain Kit 520ERT3 13/50 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €109.10
D.I.D 48011334 : DID/PBR Chain Kit 520ERT3 13/50 Super-Reinforced - Ultra-Light Rear Sprocket €104.57
AFAM : AFAM Chain kit 520XSR 16/43 Super-Reinforced - Ultra-light Hard anodized rear sprocket €173.94
AFAM 48010771 : AFAM Chain Kit 520XLR2 12/40 Standard - Ultra-Light Hard Anodized Rear Sprocket €119.77