D.I.D : DID/JT Chain Kit 520ERT3 14/50 Super-Reinforced - Ultra-Light Self-Cleaning Rear Sprocket 102,53 €
AFAM 48011524 : AFAM Chain kit 520XRR3 13/50 Reinforced - Ultra-light Hard anodized rear sprocket 146,51 €
JT SPROCKETS JTA210.50BLK : JT SPROCKETS Aluminium Ultraleichtes selbstreinigendes Kettenrad 210-520 32,70 €