Vortex 165ZR-55 Aluminum Rear Sprocket 520 Pitch 55-Tooth Silver

The Vortex 165ZR-55 is a high-performance 55-tooth aluminum rear sprocket designed for street and sport motorcycle applications. Built to Vortex Racing's exacting standards, this sprocket is machined from aerospace-grade 7075-T6 aluminum for an optimal combination of strength, durability, and reduced rotational mass.

Key Features:

• 55-Tooth Rear Sprocket — ideal for stunt riding and lower gear ratio applications requiring enhanced low-end torque and acceleration
• 520 Pitch Chain Compatibility — engineered for use with standard 520-pitch motorcycle drive chains
• 7075-T6 Aerospace Aluminum Construction — lightweight material reduces unsprung and rotational weight for improved performance
• Silver Finish — Vortex sprockets in 55-tooth and larger sizes are finished in silver
• Patented Tooth Design — unique tooth geometry engineered to extend sprocket longevity and promote smooth chain engagement
• Precision Machined — manufactured to tight tolerances for consistent performance and reliable power transfer

The Vortex 165ZR-55 rear sprocket is a popular upgrade for riders looking to alter their final drive ratio for stunt work, track use, or aggressive street riding. Paired with a matching 520-pitch chain and front sprocket, it delivers reliable drivetrain performance backed by Vortex Racing's reputation for quality motorcycle components.