D.I.D 486890 : DID/JT Chain Kit 520ERT3 13/48 Racing - Ultra-Light Self-Cleaning Rear Sprocket €103.52
AFAM : AFAM Chain kit 530XHR2 17/45 Super-Reinforced - Ultra-light Hard anodized rear sprocket €256.91
D.I.D 48011452 : DID/PBR Chain Kit 520ERT3 13/49 Super-Reinforced - Ultra-Light Rear Sprocket €101.60