Vortex 592ZK-39 Black Aluminum Rear Sprocket 39-Tooth 520 Pitch

The Vortex 592ZK-39 is a 39-tooth, 520-pitch black anodized aluminum rear sprocket engineered for performance-oriented street and track riders. Designed and manufactured by Vortex Racing in the USA, this sprocket delivers a precise fit and reliable power transfer as a direct replacement or performance upgrade.

Key Features:

• Lightweight aluminum construction reduces rotating mass for improved throttle response and acceleration
• 100% CNC manufactured in the USA to exacting tolerances for concentricity and consistent fit
• Specially formulated alloy per Vortex specifications for optimal strength-to-weight ratio
• Black anodized finish provides corrosion resistance and a clean, aggressive appearance
• Unique Vortex tooth design increases sprocket longevity and promotes smooth chain engagement
• 39 teeth — suitable for tuning gear ratios toward improved low-end torque and acceleration
• 520 pitch — compatible with standard 520-series drive chains

Vortex rear sprockets are the go-to choice for racers and performance riders who demand precision engineering without unnecessary weight. The 592ZK-39 allows riders to fine-tune their drive ratio for the track or street, delivering consistent and reliable performance mile after mile.