Vortex 491ZR-38 CAT5 Aluminum Rear Sprocket 520 Pitch 38-Tooth Silver

The Vortex 491ZR-38 is a CAT5 aluminum rear sprocket featuring a 520 pitch and 38 teeth, finished in a silver anodized coating. Designed as a direct performance upgrade over heavier OEM steel sprockets, this sprocket is 100% CNC machined in the USA from a specially formulated aluminum alloy per Vortex specifications.

Key Features:

• 520 Pitch — compatible with 520-series chain applications
• 38-Tooth rear sprocket configuration
• Lightweight aluminum construction — reduces rotating mass for improved acceleration and throttle response
• Silver anodized finish — electrically coated for a brighter shine and corrosion resistance
• Vortex patented tooth design — unique profile increases sprocket longevity and reduces chain wear
• 100% CNC manufactured in the USA — machined to precise tolerances for a perfectly concentric fit
• Saber tooth grooves for optimized chain engagement

The Vortex 491ZR-38 is engineered for riders seeking a lightweight, high-performance replacement or gearing upgrade. The reduced rotating mass compared to OEM steel sprockets translates directly to sharper throttle response and improved overall drivetrain efficiency, making it a popular choice for both street and track use.