Vortex 491ZR-39 520 Aluminum Rear Sprocket 39-Tooth Red

The Vortex 491ZR-39 is a 39-tooth, 520-pitch red anodized aluminum rear sprocket designed for high-performance street and track use. Engineered by Vortex Racing in the USA, this sprocket delivers a significant weight reduction over OEM steel sprockets, helping reduce rotating mass for improved throttle response and acceleration.

Key Features:

• 100% CNC machined in the USA to precise tolerances for perfect concentricity
• Specially formulated aerospace-grade aluminum alloy per Vortex specifications for optimal strength-to-weight ratio
• Red anodized finish for corrosion resistance and aggressive race-ready styling
• Patented unique tooth design increases sprocket longevity and wear resistance
• 520 chain pitch compatible
• 39 teeth for fine-tuned gear ratio optimization

The 491ZR-39 is part of Vortex Racing's lineup of aluminum rear sprockets trusted by road racers and performance riders worldwide. Upgrading to this lightweight aluminum sprocket reduces unsprung and rotating weight compared to stock, contributing to sharper handling and more responsive power delivery.