Vortex 255A-55 Silver 55-Tooth 520 Aluminum Rear Sprocket

The Vortex 255A-55 is a 55-tooth, 520-pitch aluminum rear sprocket designed for high-performance street and track motorcycles. Machined from premium 7075-T6 aircraft-grade aluminum, this sprocket delivers an ideal balance of strength and weight savings — making it a popular choice for stunt riders and performance enthusiasts who need a larger rear sprocket ratio.

Key Features:

• 55-Tooth / 520 Pitch: Increases rear sprocket ratio for improved low-end torque, faster acceleration, and enhanced stunt performance
• 7075-T6 Aluminum Construction: High-strength aerospace-grade alloy provides excellent durability while dramatically reducing rotating mass compared to steel
• Vortex Patented Tooth Design: Unique tooth profile engineered to extend sprocket life and improve chain engagement
• 100% CNC Machined in the USA: Precision manufacturing ensures tight tolerances and consistent fitment
• Silver Finish: Natural aluminum finish — note that Vortex 55-tooth and larger sprockets are available in silver only
• Lightweight Design: Reduces unsprung and rotating weight to help put more power to the pavement

The Vortex 255A-55 rear sprocket is a direct bolt-on replacement or performance upgrade for a wide range of 520-chain motorcycles. Whether you're gearing down for stunt riding, supermoto, or track use, this sprocket delivers race-proven performance at an accessible price point.