Renthal – Renthal Rear Sprockets - Other, including 10-20 BMW S1000R/RR/XR hard anodized sprockets, Aprilia RSV1000, RSV 4, Tuono, Pegaso and Tuareg 660 fitments, Barnes style grooved sprockets and 76 x 100 PCD sprockets for BST carbon, Marchesini and OZ Racing wheels. This is where the catalog covers everything outside the main Japanese and Austrian dirt families, from European sportbikes to aftermarket forged and carbon wheel carriers. Both 520 and 525 pitch options appear, typically in the low-to-mid 40s tooth range that road and track-day riders use to sharpen drive out of second- and third-gear corners without wrecking top speed. Because these bikes make serious torque, the hard anodized 7075-T6 construction matters: it keeps weight off the wheel while resisting the tooth wear that a powerful engine and a heavy chain create. Correct PCD machining also means the sprocket clamps flat to an expensive carrier instead of loading bolts unevenly. The payoff is crisper acceleration, a quieter drivetrain and gearing that stays accurate long after a budget sprocket would need replacing. Track-day riders often keep two rear sprockets on the shelf and swap ratios to suit the circuit.