Vortex 642CZK-38 CAT5 Aluminum Rear Sprocket Black 38T

The Vortex 642CZK-38 is a CAT5 aluminum rear sprocket featuring a 38-tooth count and a black finish, designed for performance-focused motorcycle riders seeking a lightweight, durable drivetrain upgrade. Built to Vortex's exacting standards, this sprocket delivers reliable power transfer and reduced rotational mass compared to standard steel sprockets.

Key Features:

• CAT5 aluminum construction — specially formulated alloy per Vortex specifications for maximum strength-to-weight ratio
• 38-tooth rear sprocket — allows precise gear ratio tuning for acceleration or top-speed optimization
• Black finish — electroplated or hardcoat anodized black for corrosion resistance and aggressive aesthetics
• Vortex patented tooth design — unique profile engineered to increase sprocket longevity and reduce chain wear
• 100% CNC machined in the USA — precision manufacturing ensures consistent quality and exact tolerances
• Lightweight design — reduces rotating mass to improve throttle response and overall performance

The Vortex 642CZK-38 is part of the trusted Vortex Racing sprocket lineup, a go-to choice for track riders and street performance enthusiasts who demand premium quality components. Compatible with 520-pitch chain applications.