Vortex 642AV4-45 VTX Aluminum Rear Sprocket 45-Tooth

The Vortex 642AV4-45 is a lightweight aluminum rear sprocket featuring 45 teeth, designed for riders seeking reduced rotational mass and improved powertrain performance. Vortex Racing sprockets are a popular choice for both track and street applications where weight savings and precision matter.

Key Features:

• Lightweight aluminum construction — reduces rotating mass compared to steel, helping deliver more responsive throttle feel and improved acceleration
• 100% CNC manufactured in the USA — machined to precise tolerances for consistent concentricity and reliable chain engagement
• Specially formulated alloy per Vortex specifications for an optimal balance of strength and weight
• Anodized finish — provides corrosion resistance while delivering the distinctive two-tone machined appearance Vortex is known for
• Unique Vortex tooth design — patented profile engineered to increase sprocket longevity and optimize chain contact
• Lightening holes — strategically placed cutouts further reduce rotating mass without sacrificing structural integrity
• 45-tooth rear sprocket — allows fine-tuning of the final drive ratio for improved low-end torque and acceleration response

Vortex aluminum rear sprockets are manufactured in the USA and are a trusted upgrade for riders looking to reduce unsprung and rotating weight. As with all aluminum sprockets, regular chain cleaning and tension checks every 300–400 miles will maximize service life.