Alpha Racing Sprocket aluminum, T45, 520, for OZ wheel BMW S1000RR 2009-2021,M1000RR 2021- s1000rr The DID chain has longer

The DID chain has longer life and less friction thanks to the patented X-rings

The Anti-hopping effect can be adjusted for every riding style

- clutch cover

- rear axle nut moves to the right side

Alpha Racing Sprocket aluminum, T45, 520, for OZ wheel BMW S1000RR 2009-2021,M1000RR 2021- s1000rr The DID chain has longerAlpha racing Aluminum 520 Rear Sprocket 45T for OZ Marchesini wheel Alpha Racing Aluminum 520 Rear Sprocket 2020 S1000RR OZ \ Marchesini OEM 2020 BMW S1000RR stock gearing is Front 17T and Rear 45T and stock chain length of 120 Link, 525 pitch Aluminium Rear sprocket for OZ Motorbike wheels 520 Sprocket To fit most aftermarket wheels such as OZ and Marchesini silver anodised T=45 pitch 520 centering hole 76 mm hole circle 100 mm 5 holes d=10,2 mm