Vortex 642A-39 Aluminum Rear Sprocket 39-Tooth 520-Pitch Silver

The Vortex 642A-39 is a high-performance aluminum rear sprocket designed for sportbike applications. This 39-tooth sprocket features 520-pitch sizing and delivers an excellent balance of acceleration and top speed for street and track use.

Premium Construction:

• CNC machined from 7075-T6 aerospace-grade aluminum for exceptional strength-to-weight ratio
• 100% computer-designed tooth profile with saber tooth grooves for increased longevity
• Vortex patented tooth design reduces wear and extends service life
• Silver anodized finish for corrosion resistance and clean appearance
• Precision manufacturing ensures proper concentricity and smooth operation

Performance Benefits:

• Lightweight aluminum construction reduces unsprung weight for improved handling and suspension performance
• Optimized tooth geometry provides smooth chain engagement and reduced noise
• Made in USA to strict quality standards
• Direct replacement for OEM sprockets on compatible sportbikes

The 39-tooth configuration is ideal for riders seeking a balance between acceleration and highway cruising. Vortex sprockets are trusted by professional racers and track day enthusiasts worldwide for their durability and performance.