The Renthal UltraLight Rear Chainwheel is a CNC-machined rear sprocket made from 7075 T6 aluminum. Model 397U-520-42P-HA features a 520 chain size and 42 teeth, providing a lightweight alternative to steel sprockets for powersports applications.
Computer engineered and tested for precise fitment, concentricity, and load dispersion, this rear sprocket uses tooth profiling designed to support efficient power transfer. Its high-strength aluminum construction, advanced manufacturing methods, and hardwearing surface treatment are intended for demanding riding conditions.
This sprocket is listed for 2020 BST Carbon, Marchesini, and OZ Racing wheels with a 76 x 100 PCD rear sprocket pattern. Verify the wheel, chain size, tooth count, and mounting pattern before purchase. The manufacturer part number is 397U-520-42P-HA, and the vendor part number is 397U-520-42P-HA.
Features:
- Brand: Renthal
- Model: 397U-520-42P-HA
- Manufacturer part number: 397U-520-42P-HA
- Vendor part number: 397U-520-42P-HA
- Application: 2020 BST Carbon, Marchesini, and OZ Racing wheels
- Mounting pattern: 76 x 100 PCD
- Chain size: 520
- Tooth count: 42 teeth
- Material: CNC-machined 7075 T6 aluminum
- Construction: UltraLight rear chainwheel designed to be 66% lighter than steel
- Tooth profile: Designed for power transfer and load dispersion
- Manufacturing: Computer engineered and tested for fitment and concentricity
Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: powersports
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1