Vortex 491AZR-51 530 Aluminum Rear Sprocket 51-Tooth Silver

The Vortex 491AZR-51 is a 51-tooth, 530-pitch aluminum rear sprocket finished in silver anodize. Built to the exacting standards that have made Vortex Racing the go-to choice for professional racers and performance street riders worldwide, this sprocket delivers a winning combination of precision, lightweight construction, and long-lasting durability.

Key Features:

• 530 Chain Pitch — designed for 530-pitch drive chains
• 51 Teeth — ideal for tuning final drive ratio for more low-end torque and acceleration
• 7075 T6 Aluminum Construction — premium alloy provides an exceptional strength-to-weight ratio
• 100% CNC Machined in the USA — manufactured to the tightest tolerances for concentricity and reliable power transfer
• Silver Anodized Finish — corrosion-resistant anodizing helps shed dirt and protects against the elements
• Lightening Holes — strategically placed cutouts reduce rotating mass for improved throttle response
• Racer-Proven Design — trusted by championship-level teams and professional riders across AMA Superbike, Supercross, and motocross

Reducing rotating mass with a Vortex aluminum rear sprocket helps put more power to the pavement while allowing precise gearing adjustments to suit your riding style or track conditions. The 491AZR-51 is a direct-fit, bolt-on upgrade over OEM sprockets for compatible applications.