D.I.D 482546 : DID/REN Chain Kit 520ERT3 13/49 Racing - Ultra-Light Self-Cleaning Rear Sprocket €140.92
RENTHAL 40600098 : RENTHAL Chain Kit 520R1 13/49 Standard - Ultra-Light Self-Cleaning Rear Sprocket €232.05
PBR 899 52 TC6 : PBR Twin Color Aluminium Ultra-Light Self-Cleaning Hard Anodized Rear Sprocket 899 - 520 €52.30
AFAM 48011115 : AFAM Chain Kit 520XRR3 13/50 Reinforced - Ultra-Light Self-Cleaning Rear Sprocket €154.06