Renthal 462-520-38P-HA Ultralight Rear Sprocket 520 Chain 38-Tooth Hard Anodized

The Renthal 462-520-38P-HA Ultralight Rear Sprocket is a precision-engineered 38-tooth, 520-pitch rear chainwheel built for demanding street and road racing applications. CNC machined from high-strength, specially enhanced 7075 T6 aluminum alloy, this sprocket delivers a championship-proven combination of extreme lightweight construction and exceptional durability.

At 66% lighter than a comparable steel sprocket, the Ultralight design minimizes revolving unsprung mass at the rear wheel — directly improving throttle response, power transfer, and handling. Every sprocket is individually machined at Renthal's UK engineering facility to the tightest possible tolerances, ensuring accurate concentricity and a reliable, precise fit.

Key Features:

• 520 chain pitch, 38 teeth — direct OEM-style fitment for compatible applications
• 7075 T6 aluminum alloy — high-strength, lightweight material used across Renthal's race-proven chainwheel lineup
• 66% lighter than steel — reduces unsprung rotational mass for improved acceleration and handling
• Hard anodized surface finish (HA) — integral coating that significantly increases surface hardness and wear resistance for extended service life
• Advanced tooth profile — computer-engineered for optimal load dispersion and maximum power transfer
• Precision CNC machined — individually manufactured to extremely tight tolerances for accurate fitment and concentricity
• Trusted by factory race teams across World Superbike and Supercross/Motocross paddocks worldwide

The hard anodized (HA) finish sets this road-focused chainwheel apart, applying an integral surface treatment that dramatically increases hardness and wear resistance compared to standard anodizing — making it an ideal upgrade for both street riding and track day use.