Vortex 839AZR-45 Aluminum Rear Sprocket 45-Tooth

The Vortex 839AZR-45 is a 45-tooth aluminum rear sprocket engineered for street and racing motorcycle applications. Manufactured entirely in the USA, this sprocket delivers a premium combination of reduced rotating mass and long-term durability that serious riders demand.

Key Features:

• 45-tooth rear sprocket for optimized gear ratio tuning
• Lightweight aluminum construction — reduces rotating mass for improved throttle response and acceleration
• 100% CNC machined in the USA to precise tolerances
• Specially formulated aluminum alloy per Vortex specifications for superior strength-to-weight ratio
• Silver anodized finish for corrosion resistance and lasting appearance
• Vortex patented unique tooth design increases sprocket longevity and reduces chain wear

The 839AZR series is purpose-built for riders looking to fine-tune their drivetrain performance. Whether optimizing for top speed or low-end torque, this sprocket delivers race-proven reliability backed by Vortex Racing's decades of motorsport engineering expertise.