Vortex 817ZB-37 Blue 37-Tooth 520 Aluminum Rear Sprocket

The Vortex 817ZB-37 is a 37-tooth, 520-pitch blue anodized aluminum rear sprocket engineered for motorcycle road racing and high-performance street applications. Manufactured in the USA by Vortex Racing, this sprocket delivers the lightweight performance and precision tolerances that professional race teams and enthusiast riders demand.

Key Features:

• Tooth Count: 37 teeth
• Chain Pitch: 520
• Material: Aerospace-grade aluminum alloy — CNC machined for precise concentricity
• Finish: Blue anodized for corrosion resistance and a distinctive appearance
• Patented tooth profile designed to reduce chain wear and extend sprocket longevity
• Reduced rotating mass compared to steel sprockets for improved throttle response and acceleration
• 100% CNC manufactured in the USA to tight tolerances

Vortex Racing rear aluminum sprockets are trusted by top professional race teams worldwide. The lightweight construction reduces rotational mass, helping put more power to the pavement, while the blue anodized finish adds durability against the elements. Whether tuning for the track or optimizing street gearing, the 817ZB-37 is a proven performance upgrade over stock steel sprockets.