D.I.D 485527 : DID/JT Chain Kit 520ERT3 13/52 Racing - Ultra-Light Self-Cleaning Rear Sprocket €109.45
D.I.D 3029784 : DID/PBR Chain kit 525ZVM-X2 15/43 Super-Reinforced - Ultra-light Hard anodized rear sprocket €192.71
AFAM 48012184 : AFAM Chain kit 525XSR2 15/41 Super-Reinforced - Ultra-light Hard anodized rear sprocket €179.09