Vortex 604ZR-39 Aluminum Rear Sprocket 39-Tooth Silver

The Vortex 604ZR-39 is a lightweight, silver-anodized aluminum rear sprocket featuring 39 teeth, designed as a direct-fit performance upgrade for compatible motorcycles using the 604-series bolt pattern. Manufactured in the USA to exacting tolerances, this sprocket delivers the precision and durability that Vortex Racing is known for in both street and track applications.

Key Features:

• 39-Tooth rear sprocket for precise gear ratio tuning
• Lightweight aluminum construction reduces rotating mass for improved throttle response and acceleration
• 100% CNC manufactured in the USA to tight tolerances for concentric, reliable fitment
• Specially formulated alloy per Vortex specifications for optimal strength-to-weight ratio
• Silver anodized finish provides corrosion resistance and a clean appearance
• Vortex patented tooth design increases sprocket longevity and reduces chain wear
• Compatible with the 604-series carrier bolt pattern

Vortex rear sprockets are a popular choice for riders looking to fine-tune their gearing for improved low-end torque, quicker acceleration, or track performance. As with any sprocket replacement, it is recommended to replace the front sprocket and chain simultaneously for even wear and optimal drivetrain longevity.