Vortex 312ZK-45 Steel Rear Sprocket 45T

The Vortex 312ZK-45 is a 45-tooth steel rear sprocket engineered for performance-oriented street and track riders. Manufactured by Vortex Racing, this sprocket is precision-machined from high-strength steel and features a zinc-plated finish for enhanced corrosion resistance and long service life.

Vortex sprockets are a trusted choice among racers and enthusiasts for their exceptional quality control, precise tooth geometry, and consistent chain engagement. The 45-tooth count delivers improved low-end acceleration compared to stock gearing, making it an ideal upgrade for sport and supersport applications.

Key Features:

• 45-Tooth rear sprocket for increased acceleration and low-end torque
• Precision-machined from high-strength steel for durability and long wear life
• Zinc-plated finish provides corrosion resistance for street and track use
• CNC-machined to tight tolerances for smooth, consistent chain engagement
• Direct OEM-style fitment — no modification required
• Compatible with standard motorcycle drive chains
• Made in the USA by Vortex Racing

Whether you're dialing in your gearing for the track or optimizing street performance, the Vortex 312ZK-45 rear sprocket delivers the precision and reliability that Vortex Racing is known for.