Vortex 617ZR-39 Aluminum Rear Sprocket 39-Tooth

The Vortex 617ZR-39 is a high-performance aluminum rear sprocket designed for sport and racing motorcycles. This lightweight 39-tooth sprocket is precision CNC-machined from aerospace-grade 7075-T6 aluminum alloy, reducing rotating mass to improve acceleration and handling response.

Key Features:

• 39 teeth for optimized gearing performance
• 100% CNC-machined in the USA for precise tolerances
• 7075-T6 aerospace-grade aluminum construction
• Hard-coat anodized finish for extended wear resistance
• Vortex patented tooth profile design increases sprocket longevity
• Saber tooth grooves reduce weight without sacrificing strength
• Lightweight design reduces rotating mass for improved acceleration
• Silver finish for a clean, race-ready appearance

Vortex Racing aluminum sprockets are the choice of professional racers and performance enthusiasts seeking weight savings and precision engineering. The hard-anodized surface treatment significantly extends sprocket life compared to non-treated aluminum sprockets, while still providing substantial weight reduction over steel alternatives. Always replace sprockets and chains as a set for optimal performance and longevity.