Renthal 179U-520-45P-HA Ultralight Rear Sprocket 520 Chain 45T Hard Anodized

The Renthal 179U-520-45P-HA is an Ultralight hard anodized aluminum rear sprocket designed for street and road racing motorcycle applications. Featuring a 520 chain pitch and 45-tooth configuration, this sprocket is CNC-machined from high-strength 7075-T6 aluminum alloy — the same premium material used across Renthal's full Ultralight chainwheel lineup.

Key Features:

• 66% lighter than steel — reduces unsprung revolving mass for improved throttle response and power transfer
• Hard anodized surface finish — an integral surface coating that significantly increases hardness and wear resistance for extended service life
• Precision CNC machined to extremely tight tolerances, ensuring accurate fit, concentricity, and optimal tooth profile
• Computer-aided Ultralight design maximizes weight reduction while retaining the structural integrity required for demanding road and race use
• 520 chain pitch with 45-tooth count for precise gearing tuning
• Self-cleaning tooth profile helps prevent debris buildup and reduces wear

Renthal Ultralight rear chainwheels are trusted by factory racing teams worldwide and represent the benchmark in performance motorcycle drivetrain components. The hard anodized finish makes the 179U-520-45P-HA particularly well-suited for street riding and road racing where longevity is as important as weight savings.