Vortex 312ZR-55 Aluminum Rear Sprocket 520 Pitch 55 Tooth

The Vortex 312ZR-55 is a high-performance aluminum rear sprocket designed for sport and street motorcycles running a 520-pitch chain. With a 55-tooth count, this sprocket delivers a taller rear gear ratio, ideal for applications requiring increased low-end torque and bottom-end acceleration — a popular choice for stunt riding and aggressive street performance.

Key Features:

• 520 Pitch — compatible with standard 520-series chains
• 55 Teeth — increased tooth count for enhanced bottom-end power and acceleration
• 7075-T6 Aerospace-Grade Aluminum — premium alloy construction offers an optimal balance of strength and lightweight performance
• American Made — manufactured domestically by Vortex Racing to tight tolerances
• Anodized Finish — silver anodized for corrosion resistance and a clean look; sizes 55 and up are available in silver
• Patented Tooth Design — Vortex's unique tooth profile promotes longer sprocket life and efficient power transfer
• Direct Bolt-On Fit — engineered as a direct replacement for OEM sprockets on compatible motorcycle models

Vortex Racing has been a trusted name in motorcycle racing components for over 15 years, supplying parts to professional race teams worldwide. The 312ZR-55 is built to the same exacting standards used in road racing, supercross, and motocross competition. Always ensure the front sprocket, rear sprocket, and chain are all the same pitch when installing or upgrading your drivetrain.