Supersprox 525 rear sprocket BMW HP4 (please select number of teeth / colour)
for serial HP4 rim / 525 serial chain
light racing rear sprocket from very strong aluminium alloy (aircraft alloy)
Fits for:
- BMW HP4 (all)
(525 serial chain, HP4 OE / serial rim)
Measures:
inner diameter: 70 mm (76,5 at heel)
bolt circle diameter: 100 mm
number of bolt holes: 5
Serial bikes are often equiped with a very long gear transmission due to noise or exhaust regulations. In most cases these transmissions don´t fit best for racetracks. Often pinions with 1-2 teeth less and / or rear sprockets with 1-3 teeth more are used. In some cases a longer chain is needed. Only on racetracks with very high speed (e.g. Isle of Man, Hockenheim GP) and very narrow tracks (e.g. Fischereihafen in Bremerhaven) such an conversion will not fit best.