Vortex 604-57 Silver 57-Tooth 520-Pitch Aluminum Rear Sprocket

The Vortex 604-57 is a silver 57-tooth rear sprocket designed for 520-pitch motorcycle chain drive systems. Machined from high-grade aluminum, this sprocket delivers a lightweight performance upgrade over heavier steel OEM options, reducing rotating mass for improved throttle response and handling feel.

Vortex's patented tooth geometry is engineered to promote smooth chain engagement and extend sprocket service life. The distinctive silver finish provides an eye-catching appearance alongside functional durability for both street and track use.

Key Features:

• 57-tooth rear sprocket for increased low-end torque and acceleration
• 520 pitch chain compatibility
• Lightweight aluminum construction reduces rotating mass versus steel sprockets
• Vortex patented tooth design for enhanced longevity and chain engagement
• Silver anodized finish for corrosion resistance and visual appeal
• Precision CNC machined to tight tolerances

The 57-tooth count represents a significant over-stock gearing ratio, making the 604-57 popular for stunt riding, supermoto, and riders seeking aggressive low-speed acceleration. Always verify chain length requirements when changing sprocket tooth count from the stock specification.