Vortex 642A-57 Aluminum Rear Sprocket 520 Pitch 57 Tooth Silver

The Vortex 642A-57 is a high-performance aluminum rear sprocket designed for 520 pitch chain conversion applications. This 57-tooth sprocket is precision CNC machined from aerospace-grade 7075-T6 aluminum alloy, offering exceptional strength while significantly reducing rotating mass compared to steel sprockets.

Key Features:

• 57 teeth for optimized gearing ratios
• 520 pitch conversion sprocket design
• CNC machined from 7075-T6 aerospace aluminum
• Silver anodized finish for corrosion resistance
• Patented tooth profile design increases sprocket longevity
• Lightweight construction improves acceleration and handling
• Made in USA with strict quality control standards

Vortex sprockets feature a unique tooth design that distributes load more evenly across the chain, reducing wear and extending service life. The silver anodized finish provides excellent corrosion resistance while maintaining the precision-machined tolerances required for smooth power transfer. This sprocket is ideal for sportbike riders looking to fine-tune their gearing for track or street performance.