Renthal Twinring Rear Sprocket - 1999-2025 Yamaha YZ/WR 125-450 F/ X / FX

The Renthal Twinring Rear Sprocket combines extreme durability and reduced weight, perfect for serious motocross and off-road riders. Featuring an innovative two-piece design, it pairs a lightweight 7075 T6 aluminum inner ring with an electroless nickel-coated steel outer ring for maximum strength and longevity. Precision CNC machined and securely bonded to prevent movement, the Twinring ensures optimal power transfer and reliability even under the toughest conditions.

Key Features:

• Precision CNC Machining – Ensures accurate fitment and consistent performance with precise tolerances.

• Dual Material Construction

  • Inner Ring: Lightweight 7075 T6 aluminum reduces unsprung weight.

  • Outer Ring: Electroless nickel-coated steel delivers superior durability and long-lasting performance.

• Permanent Bond Technology – Steel outer ring expanded at 200°C, securely bonded to aluminum inner ring and fixed with socket set screws to eliminate lateral movement.

• Mud Grooves – Specially designed to reduce mud buildup, prolonging sprocket life and maintaining optimal drivetrain function.

• Professional Grade – Trusted by more factory Motocross and Supercross teams than any other sprocket brand.

Specifications:

• Inner Material: 7075 T6 Aluminum

• Outer Material: Electroless Nickel-Coated Steel

• Machining: CNC Precision Machined

• Design: Two-Piece, Permanently Bonded

• Mud Grooves: Yes (self-cleaning)

The Renthal Twinring Rear Sprocket delivers lightweight reliability, exceptional durability, and championship-winning performance for your toughest riding demands.