Vortex 780ZR-39 Aluminum Rear Sprocket 39-Tooth 520 Pitch

The Vortex 780ZR-39 is a 39-tooth aluminum rear sprocket built to Vortex Racing's exacting standards for performance street and track riders. 100% CNC-machined in the USA, this sprocket delivers a significant weight reduction over stock steel units, reducing rotating mass for improved throttle response and acceleration.

Key Features:

• 39-Tooth, 520 Pitch — Direct replacement in standard 520-chain applications
• 100% CNC Manufactured in the USA — Precision-machined for consistent quality and fitment
• Aerospace-Grade Aluminum Alloy — Specially formulated alloy per Vortex specifications for optimal strength-to-weight ratio
• Anodized Finish — Corrosion-resistant anodizing for long-lasting durability and appearance
• Patented Tooth Design — Vortex's unique tooth geometry promotes even chain wear and extended sprocket life
• Lightweight Construction — Reduces rotating mass compared to OEM steel sprockets for improved acceleration and handling

Vortex Racing is a trusted name in motorcycle drivetrain components, supplying sprockets to professional race teams and performance riders worldwide. The 780ZR-39 is engineered to meet the demands of both competitive track use and spirited street riding, making it an ideal upgrade for riders looking to optimize their drivetrain performance.