Renthal 397U-520-42P-HA Ultralight Rear Sprocket 520 Pitch 42 Tooth for Marchesini Wheels

The Renthal 397U-520-42P-HA Ultralight rear sprocket is precision-engineered for Marchesini wheels, delivering professional-grade performance for serious riders. Manufactured from 7075 T6 aluminum alloy, this sprocket offers an exceptional strength-to-weight ratio that significantly reduces rotational mass compared to steel alternatives.

Key Specifications:

• Chain pitch: 520
• Tooth count: 42 teeth
• Specifically designed for Marchesini wheel fitment
• CNC-machined from aerospace-grade 7075 T6 aluminum
• Self-cleaning mud grooves prevent debris buildup
• Hard-anodized finish for enhanced durability and wear resistance
• Ultralight design reduces unsprung weight for improved acceleration and handling

Features and Benefits:

• Computer-designed tooth profile ensures optimal chain engagement and extended chain life
• Precision manufacturing tolerances guarantee perfect concentricity
• Distinctive Renthal gold anodized finish
• Recommended replacement interval: every 2-3 chain replacements
• Trusted by professional race teams worldwide

Renthal Ultralight sprockets represent the pinnacle of sprocket technology, combining weight savings with race-proven durability. The hard anodizing process not only provides corrosion resistance but also creates a surface hardness that rivals steel sprockets while maintaining the lightweight advantage of aluminum construction.