Vortex 312ZK-49 Aluminum Rear Sprocket 415 Pitch 49-Tooth Black

The Vortex 312ZK-49 is a 49-tooth, 415-pitch aluminum rear sprocket finished in an anodized black coating. Purpose-built for motocross and off-road performance, this sprocket is a lightweight, high-strength upgrade over stock steel units, delivering improved throttle response and drivetrain efficiency.

Key Features:

• 7075 T6 Aircraft-Grade Aluminum Construction — Maximum strength-to-weight ratio with significantly reduced rotating mass compared to steel
• 100% CNC Machined in the USA — Precision manufacturing ensures concentricity, consistent alignment, and reduced drivetrain wear
• 415 Pitch Chain Compatibility — Designed specifically for 415-pitch chain systems
• 49-Tooth Rear Gearing — Tuned for enhanced low-end torque and improved acceleration
• Anodized Black Finish (ZK) — Electrically coated for corrosion resistance and a clean, race-ready appearance
• Vortex Saber Tooth Groove Design — Patent-pending tooth profile minimizes friction and drag for smoother chain engagement and extended chain life
• Lightening Holes — Strategically placed to further reduce rotational mass without compromising structural integrity

Vortex Racing has been producing championship-winning sprockets since 1995, and the 312ZK series upholds that tradition with race-proven engineering trusted by professional and amateur riders worldwide.