Renthal UltraLight Rear Chainwheels are CNC machined from 7075 T6 aluminum to extremely tight tolerances, 66% lighter than steel. Computer engineered and tested to ensure a precise fitment, concentricity and load dispersion with tooth profiling to provide maximum power transfer. A combination of high strength base material, cutting edge manufacturing methods and exceptional hardwearing surface treatments its clear to see why Renthal's light weight all aluminum rear sprockets can be found on the rear wheels of many factory race team machines.
The Renthal UltraLight Rear Chainwheel, part number 397U-520-40P-HA, is engineered for high-performance powersports applications. Crafted from CNC-machined 7075 T6 aluminum, this rear sprocket offers exceptional strength while being approximately 66% lighter than traditional steel options. Its lightweight design helps improve acceleration and handling without compromising durability, making it an ideal choice for racing and aggressive riding scenarios. The precise manufacturing process ensures a perfect fit, optimal concentricity, and even load distribution across the tooth profile, which maximizes power transfer and prolongs sprocket life. The hardwearing surface treatment further enhances resistance to wear and corrosion, ensuring reliable performance over time.
Compatible with a 76-tooth configuration and a 100 PCD bolt pattern, this sprocket is suitable for a range of high-performance bikes. Whether upgrading your existing setup or building a race-ready machine, the Renthal UltraLight Rear Chainwheel provides a combination of strength, weight savings, and precision engineering that meets the demands of professional racing and serious enthusiasts. Its design and material selection reflect Renthal’s reputation for quality and innovation in powersports components, making it a trusted choice among factory race teams and dedicated riders alike.
Features:
- CNC-machined from 7075 T6 aluminum for high strength and lightweight performance
- Approximately 66% lighter than steel sprockets, improving acceleration and handling
- Computer-engineered for precise fitment, concentricity, and load dispersion
- Tooth profiling designed to maximize power transfer
- Hardwearing surface treatment for enhanced durability and corrosion resistance
US Dollars
