D.I.D 484579 : DID/REN Chain Kit 520ERT3 13/48 Racing - Ultra-Light Self-Cleaning Rear Sprocket €136.46
AFAM 48012751 : AFAM Chain kit 520XSR 15/45 Super-Reinforced - Ultra-light Hard anodized rear sprocket €185.24
D.I.D 48013043 : DID/PBR Chain Kit 525VX3 15/42 Standard - Ultra-Light Hard Anodized Rear Sprocket €228.32