Vortex 642AZUV4-40 VTX Aluminum Rear Sprocket 40T

The Vortex 642AZUV4-40 is a 40-tooth aluminum rear sprocket from Vortex's VTX series, engineered for riders seeking a lightweight, high-performance alternative to stock steel sprockets. Precision-machined from 7075-T6 aluminum alloy, this sprocket delivers an excellent strength-to-weight ratio, reducing unsprung rotational mass for improved throttle response and handling.

Key Features:

• 40-tooth tooth count for optimized final drive gearing
• Precision-machined from lightweight 7075-T6 aluminum for maximum strength and durability
• Hard anodized finish resists corrosion and wear, extending service life
• CNC-machined to tight tolerances for smooth, precise chain engagement
• Lightening cuts reduce overall sprocket weight without sacrificing structural integrity
• Direct OEM-replacement fitment — no modifications required
• Designed to work with standard O-ring, X-ring, and Z-ring drive chains

Vortex sprockets are manufactured in the USA and are a favorite among track riders, commuters, and performance enthusiasts alike. The 642AZUV4-40 is a direct bolt-on replacement that installs with standard hand tools, making it an easy upgrade for any garage.