D.I.D 3041791 : DID/PBR Chain Kit 525ZVM-X2 15/42 Super-Reinforced - Ultra-Light Hard Anodized Rear Sprocket €273.73
JT DRIVE CHAIN 486608 : JT Chain Kit 520HDS 13/48 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €70.47