Vortex 642CZR-39 Aluminum Rear Sprocket 39-Tooth 520 Pitch

The Vortex 642CZR-39 is a lightweight aluminum rear sprocket designed for high-performance street and racing applications. Engineered with 39 teeth and 520 pitch, this sprocket delivers optimal power transfer while reducing rotational mass for improved acceleration and handling.

Key Features:

• 100% CNC machined in the USA from aerospace-grade aluminum alloy
• Specially formulated alloy per Vortex specifications for maximum strength and durability
• Anodized finish prevents corrosion and extends service life
• Patented tooth design increases sprocket longevity
• Precision manufacturing ensures concentricity and proper chain alignment
• Significantly lighter than steel sprockets for reduced unsprung weight

Vortex sprockets are manufactured to the tightest tolerances using premium materials, making them the choice of professional racers and serious enthusiasts. Each sprocket undergoes rigorous quality control to ensure reliable performance under extreme conditions. The unique tooth profile reduces wear and provides smooth, consistent power delivery throughout the sprocket's lifespan.