Vortex 490ZK-50 Black 50-Tooth Aluminum Rear Sprocket

The Vortex 490ZK-50 is a 50-tooth black anodized aluminum rear sprocket engineered for performance street and track riders demanding a lightweight, precision-made drivetrain component. Part of Vortex's trusted rear sprocket lineup, the 490ZK-50 delivers the durability and consistency that racing applications require.

Key Features:

• Lightweight aluminum construction — reduces rotating mass for improved throttle response and acceleration
• 100% CNC manufactured in the USA — machined to precise tolerances for concentricity and reliable power transfer
• Specially formulated alloy — proprietary Vortex aluminum specification for optimal strength-to-weight ratio
• Patented tooth design — unique profile increases sprocket longevity and promotes smooth chain engagement
• Black anodized finish (ZK) — durable, corrosion-resistant coating with an aggressive look
• 50 teeth — taller rear gearing for improved low-end torque and acceleration

Vortex rear sprockets are a popular OEM replacement and performance upgrade, offering a direct-fit solution that improves upon stock steel sprockets in both weight and longevity. The 490ZK-50 is the black anodized variant of the 490-50 series.