Vortex 921AZGV4-36 520 Aluminum Rear Sprocket 36-Tooth Silver Anodized

The Vortex 921AZGV4-36 is a lightweight, 36-tooth aluminum rear sprocket designed for 520 pitch chain applications. Machined in the USA from aerospace-grade 7075-T6 billet aluminum, this sprocket delivers significant weight savings over OEM steel units, reducing rotating mass for improved acceleration, deceleration, and overall handling response.

Vortex's signature silver anodized finish provides corrosion resistance while showcasing the precision CNC machining beneath. The patented tooth geometry is engineered to extend sprocket longevity and promote smooth, consistent chain engagement under race and street conditions alike.

Key Features:

• Constructed from 7075-T6 aerospace-grade billet aluminum for maximum strength-to-weight ratio
• 100% CNC machined in the USA to tight tolerances
• Silver anodized finish for corrosion resistance and clean aesthetics
• Compatible with 520 pitch chain (GV4 bolt pattern)
• 36 teeth — ideal for fine-tuning gear ratios
• Patented Vortex tooth design for extended sprocket and chain life
• Reduces rotating mass compared to OEM steel sprockets
• Trusted by professional race teams in Motocross, Supercross, and Road Racing

Whether you're chasing lap times on the track or optimizing street performance, the Vortex 921AZGV4-36 rear sprocket is a proven upgrade that delivers real, measurable results.