JT DRIVE CHAIN 483637 : JT Chain Kit 520HDS 13/49 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket 70,47 €
D.I.D : DID/PBR Chain Kit 520DZ2 15/50 Reinforced - Ultra-Light Self-Cleaning Hard Anodized Rear Sprocket 111,21 €