Vortex 151ZB-39 Steel Rear Sprocket 39-Tooth Black

The Vortex 151ZB-39 is a 39-tooth steel rear sprocket finished in an electro-plated satin black coating for corrosion resistance and a clean, aggressive look. Engineered for street and performance motorcycle applications, this sprocket is manufactured to precise tolerances from a carbon steel alloy formulated to Vortex's proprietary specifications.

Key Features:

• 39-Tooth rear sprocket for precise gear ratio tuning
• Satin black electro-plated finish provides corrosion protection and durability
• Carbon steel alloy construction per Vortex specifications for strength and longevity
• Vortex patented tooth profile design reduces wear and extends sprocket life
• Lightening holes reduce rotating mass for improved throttle response
• Manufactured to strict concentricity tolerances for smooth, quiet power delivery
• Drop-in replacement — no modifications required

Vortex Racing steel rear sprockets are a trusted choice among street riders and track day enthusiasts who demand reliable, long-lasting drivetrain components. The black ZB finish pairs well with a wide range of motorcycle aesthetics while offering real-world corrosion protection.