Renthal 524U-520-51GRSI Ultralight Rear Sprocket 51-Tooth 520 Chain Silver

The Renthal 524U-520-51GRSI is a 51-tooth Ultralight rear chainwheel (sprocket) designed for 520-pitch chains, finished in silver anodize. CNC machined in the UK from high-strength 7075 T6 aluminum alloy, this sprocket delivers the ideal balance of low weight and exceptional durability demanded by motocross, supercross, and enduro racing.

Key Features:

• 66% lighter than steel — dramatically reduces revolving unsprung mass at the rear wheel for improved acceleration and handling
• Precision CNC machined to the tightest possible tolerances, ensuring accurate fitment, concentricity, and reliable load dispersion
• High-strength 7075 T6 aluminum alloy — specially enhanced for maximum tensile strength and wear resistance
• Self-cleaning mud grooves between every tooth on both sides to prevent dirt buildup and reduce chainwheel wear
• Silver anodized finish — an integral surface coating that resists corrosion and helps personalize your setup
• 520 chain pitch — compatible with standard 520-pitch drive chains
• 51-tooth rear sprocket for tuning drive ratio to your riding needs

Renthal Ultralight rear sprockets are trusted by more factory motocross and supercross race teams than any other chainwheel brand in the world. Each sprocket leaves Renthal's UK engineering facility individually machined and inspected to ensure race-winning performance and fit.