Renthal Rear Sprocket, 55-Tooth Aluminum, Red for Honda (189U-420-55GRRD)

Upgrade your Honda motorcycle with the RENThAL 189U-420-55GRRD rear sprocket, engineered for riders who want efficient power transfer, reduced unsprung weight, and dependable performance. This 55-tooth sprocket is CNC-machined rather than stamped, allowing for precise manufacturing and a computer-aided ultra-light design that helps reduce rotating mass without compromising the strength required for demanding riding conditions.
The rear sprocket is manufactured from high-strength, specially enhanced 7075-T6 aluminum. Compared with steel, this material is 33% lighter, helping reduce weight and improve power transfer through the drivetrain. Its red finish adds a distinctive appearance while providing a performance-focused replacement for compatible Honda applications. The combination of lightweight construction and durable aluminum makes this sprocket well suited for motocross, off-road, and performance-oriented riding.
RENTHAL also incorporates a specialized tooth profile designed to help the chain roll smoothly onto and off the sprocket. This design can promote longer component wear, reduce drivetrain noise, and support more efficient power delivery. For proper fit and performance, confirm that the 189U-420-55GRRD part number and 55-tooth configuration match your Honda model, chain size, and gearing requirements before installation.

Features:

• CNC-machined construction: Precision-manufactured instead of stamped for accurate performance and consistent quality.

• Ultra-light design: Computer-aided construction helps reduce unsprung and rotating weight for improved power transfer.

• 7075-T6 aluminum: High-strength, specially enhanced aluminum is 33% lighter than steel without sacrificing durability.

• 55-tooth gearing: Provides a performance-oriented rear sprocket configuration for compatible Honda applications.

• Special tooth profile: Helps the chain roll smoothly on and off the sprocket for longer wear, less noise, and efficient power delivery.

• Red finish: Adds a distinctive appearance to the drivetrain while complementing performance-focused builds.

Ships from Parts Unlimited.