JT DRIVE CHAIN 481415 : JT Chain Kit 520HDS 13/50 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €71.50
D.I.D 3034540 : DID/JT Chain Kit 525ZVM-X2 15/39 Super-Reinforced - Ultra-Light Rear Sprocket €155.37
AFAM 48011428 : AFAM Chain Kit 520MR2 9/44 Standard - Ultra-Light Hard Anodized Rear Sprocket €103.31