Vortex 438KV4-45 VTX Aluminum Rear Sprocket Pitch Sprockets - 45-Tooth 520

The Vortex 438KV4-45 VTX Aluminum Rear Sprocket is a high-performance replacement rear sprocket engineered for serious street and track riders. Machined from lightweight, high-strength aluminum alloy, this 45-tooth sprocket is designed for use with 520 pitch chains and delivers a perfect balance of reduced unsprung weight and durable, long-lasting performance.

Key Features:

• 45-Tooth Configuration – Optimized gearing for improved acceleration and responsive throttle feel
• 520 Chain Pitch Compatibility – Designed to work seamlessly with standard 520 series drive chains
• Lightweight Aluminum Construction – Reduces unsprung rotational mass for improved handling and quicker acceleration
• Hard Anodized Finish – Provides superior corrosion resistance and extended service life
• CNC Machined Precision – Tight tolerances ensure smooth, consistent chain engagement and reduced wear
• Direct OEM Replacement – Bolt-on fitment with no modifications required

Vortex Racing is a trusted name in the powersports industry, known for producing premium drivetrain components that meet the demands of both competitive racers and performance-oriented street riders. The VTX series rear sprocket is a popular upgrade for riders looking to fine-tune their bike's gearing without sacrificing reliability or adding unnecessary weight.