Vortex 215ZK-39 Aluminum Rear Sprocket 39 Tooth 420 Pitch

The Vortex 215ZK-39 is a high-performance aluminum rear sprocket engineered for Honda mini bikes including the Grom and Monkey (2022+). This lightweight racing sprocket delivers exceptional strength while significantly reducing rotating mass for improved acceleration and handling performance.

Premium Construction and Design:

• CNC machined from aerospace-grade 7075-T6 aluminum for maximum strength-to-weight ratio
• Patented Vortex tooth design reduces drag and friction for better acceleration and deceleration
• Precision manufacturing ensures perfect concentricity, extending chain and sprocket life
• Weight-saving cutouts and lightening holes minimize rotating mass
• CAT5 anodized finish provides long-lasting corrosion resistance and attractive appearance

Specifications:

• Tooth Count: 39 teeth
• Chain Pitch: 420
• Material: 7075-T6 aluminum alloy
• Finish: Anodized
• Mounting Position: Rear

The reduced weight compared to OEM steel sprockets translates directly into quicker throttle response and improved overall bike performance. Vortex's unique manufacturing process creates a perfectly concentric sprocket every time, which frees up horsepower and provides a stronger, quieter, and longer-lasting drivetrain component.