Vortex 253ZR-39 525 Steel Rear Sprocket 39-Tooth Black

The Vortex 253ZR-39 is a 39-tooth, 525-pitch steel rear sprocket finished in an electro-plated satin black coating for long-lasting corrosion resistance. Precision laser-cut from carbon steel alloy to exact Vortex specifications, this sprocket delivers the concentricity and durability that serious street and track riders demand.

Key Features:

• 525 pitch — compatible with standard 525-chain motorcycles
• 39 teeth — stock-equivalent gearing for balanced acceleration and top speed
• Laser-cut carbon steel construction — manufactured to tight tolerances for precise fit and concentricity
• Electro-plated satin black finish — resists corrosion and maintains appearance over time
• Hardened teeth — engineered to withstand high mileage without loss of structural integrity
• Lightening holes — strategically placed cutouts reduce rotating mass without sacrificing strength
• Vortex patented tooth profile — unique design increases sprocket longevity and promotes smooth chain engagement

Vortex Racing has been manufacturing top-quality motorcycle drivetrain components in the USA for over 15 years, with direct feedback from professional race teams worldwide. The 253ZR-39 is the ideal choice for riders seeking a durable, performance-grade replacement rear sprocket for 525-chain applications.