Vortex 491ZR-51 Red 51-Tooth 520 Aluminum Rear Sprocket

The Vortex 491ZR-51 is a 51-tooth, 520-pitch aluminum rear sprocket finished in a red anodize, designed for performance-minded motorcycle riders who demand lightweight drivetrain components without sacrificing durability. Engineered and manufactured in the USA, Vortex Racing sprockets are trusted across Motocross, Supercross, Road Racing, and Flat Track Racing disciplines.

Key Features:

• 51-Tooth, 520 Pitch: Direct-replacement rear sprocket in a larger tooth count for tuned acceleration and low-end response
• 100% CNC Machined: Precision-manufactured to tight tolerances for concentricity and smooth chain engagement
• Lightweight Aluminum Construction: Reduces rotating mass to improve throttle response and overall performance
• Red Anodized Finish: Hard-anodized for corrosion resistance and a distinctive appearance
• Vortex Patented Tooth Design: Unique saber-tooth profile increases sprocket longevity and improves chain engagement
• Made in the USA: Designed, manufactured, and tested by Vortex Racing

Vortex Racing has over 15 years of experience producing top-quality motorcycle racing components. Their sprockets are validated on the track with direct feedback from professional race teams worldwide. The 491ZR-51 is an ideal upgrade for riders looking to fine-tune their gearing for maximum acceleration performance.