
RENTHAL Ultra-Light Mud-Resistant Hard Anodized Rear Sprocket - 520 (manufacturer part number: 224U-520-50GPPE): a sprocket designed for demanding riders, whether they ride motocross, enduro, or on a roadster trail/SM. Engineered to minimize mud retention and reduce friction between the chain and teeth, it enhances acceleration response on muddy terrain.
Result: a lightweight and robust sprocket designed to improve transmission responsiveness and withstand the demands of off-road riding. Compatible with 520 chains, it fits many machines — for example, GAS GAS SM 700 (2026), KTM 690 SMC R (2026), or DUCATI DESMO 450 MX (2026) — subject to verification of tooth count and pitch. Ideal for those seeking reliability and performance on both track and road.