Vortex 838ZR-39 Black Aluminum 39-Tooth Rear Sprocket

The Vortex 838ZR-39 is a lightweight, high-performance aluminum rear sprocket featuring a 39-tooth count and Vortex's signature black anodized ZR finish. 100% CNC-manufactured in the USA from a specially formulated aluminum alloy per Vortex's own specifications, this sprocket delivers the precision and durability demanded by both track racers and performance street riders.

Key Features:

• 39-Tooth aluminum rear sprocket in black anodized (ZR) finish
• 100% CNC machined in the USA for precise tolerances and concentricity
• Specially formulated aluminum alloy per Vortex specifications for optimal strength-to-weight ratio
• Black anodized finish resists corrosion and provides a clean, aggressive look
• Vortex patented unique tooth design increases sprocket longevity and reduces chain wear
• Lightweight construction reduces rotating mass for improved throttle response and acceleration

Vortex rear sprockets are a trusted choice among racers and performance riders seeking a direct OEM replacement or a gearing upgrade. The reduced rotating mass of the aluminum construction helps put more power to the ground, while the precise CNC machining ensures a quiet, smooth, and long-lasting drivetrain.