Vortex 120BZK-39 Black Steel Rear Sprocket 39-Tooth

The Vortex 120BZK-39 is a 39-tooth black steel rear sprocket engineered for high-performance motorcycle applications. Built to Vortex Racing's exacting standards, this sprocket is manufactured from chromoly steel and features a durable black zinc finish that resists corrosion and wear while delivering a clean, aggressive look.

Key Features:

• 39 Teeth – Precision tooth count for optimized gear ratio tuning
• Black Zinc Steel Construction – Hard-wearing finish for extended service life and corrosion resistance
• CNC Machined – Manufactured to tight tolerances for precise concentricity and smooth chain engagement
• High-Tensile Chromoly Steel – Provides superior strength and durability over OEM steel sprockets
• Compatible with Vortex and OEM-spec chains of the appropriate pitch

Vortex Racing sprockets are trusted by professional racers and serious street riders worldwide. The 120BZK-39 is a direct-fit replacement or upgrade option, allowing riders to fine-tune acceleration and top-end performance by adjusting gear ratios. Always replace the front sprocket and chain simultaneously for optimal drivetrain longevity.