Vortex 610ZO-39 Aluminum Rear Sprocket 39T

The Vortex 610ZO-39 is a 39-tooth aluminum rear sprocket engineered for street and track performance. Manufactured in the USA by Vortex Racing, this sprocket is CNC-machined from aerospace-grade aluminum and features hard anodizing for enhanced surface durability and corrosion resistance.

Key Features:

• 39 Teeth — precise tooth count for optimized gear ratio tuning
• Aerospace-grade aluminum construction — significantly lighter than steel, reducing rotating mass for improved throttle response
• Hard anodized finish — resists wear and corrosion for extended service life
• 100% CNC manufactured — tight tolerances ensure concentricity and smooth chain engagement
• 610 carrier pattern — bolt pattern specific to compatible motorcycle applications
• Designed for use with the matching chain pitch — verify chain pitch compatibility before installation

Vortex Racing rear aluminum sprockets are a popular upgrade for riders looking to reduce unsprung rotational mass and fine-tune their gearing. Replacing the stock steel sprocket with a lightweight aluminum unit like the 610ZO-39 can noticeably improve acceleration feel. For maximum drivetrain longevity, replace the front sprocket and chain simultaneously.