Vortex 615BZK-51 615 Black Aluminum Rear Sprocket 51-Tooth

The Vortex 615BZK-51 is a 51-tooth, 615-pitch black anodized aluminum rear sprocket engineered for high-performance motorcycle applications. Built to Vortex Racing's exacting standards, this sprocket delivers a winning combination of reduced rotational mass and precise power transfer to the rear wheel.

Key Features:

• 51-Tooth Rear Sprocket — designed for tuning gear ratios toward improved low-end torque and acceleration
• 615 Chain Pitch — sized to match 615-compatible drivetrain setups
• Black Hard-Coat Anodized Finish (BZK) — provides enhanced corrosion resistance and extended service life over standard silver aluminum
• Aerospace-Grade Aluminum Construction — lightweight material reduces unsprung and rotational mass compared to steel alternatives
• Vortex Patented Tooth Profile — unique tooth geometry increases sprocket longevity and promotes smooth chain engagement
• Manufactured to Race-Grade Tolerances — consistent with the components used by professional Motocross, Supercross, and Road Racing teams worldwide

Vortex Racing is a U.S.-based manufacturer owned and operated by motorcycle racers and enthusiasts, with over 15 years of proven performance across Motocross, Supercross, Road Racing, Flat Track, and Minibike competition. Each sprocket is produced with the finest materials and tightest dimensional tolerances in the industry, backed by real-world track testing with top professional race teams.