Vortex 920AZK-49 VTX Aluminum Rear Sprocket Pitch Sprockets - 49-Tooth 520

The Vortex 920AZK-49 is a high-performance 49-tooth aluminum rear sprocket from Vortex Racing's popular VTX series. Precision-machined from lightweight 7075-T6 aluminum, this sprocket delivers an excellent balance of strength and weight savings over a stock steel sprocket — making it a popular upgrade for street and track riders alike.

Vortex sprockets are manufactured to tight tolerances for smooth chain engagement, reduced drivetrain wear, and consistent power transfer. The hard-anodized finish provides corrosion resistance and helps maintain the sprocket's appearance over time.

Key Features:

• Material: 7075-T6 lightweight aluminum construction
• Tooth Count: 49 teeth
• Chain Pitch: 520
• Finish: Hard-anodized for durability and corrosion resistance
• Series: VTX (AZK) — direct OEM-style fitment replacement
• CNC-machined for precise tolerances and consistent chain engagement
• Significant weight reduction compared to stock steel sprockets
• Designed for street riding, commuting, and performance applications

The Vortex 920AZK-49 is a direct-fit replacement sprocket designed to restore or modify final drive gearing. Going to a larger rear sprocket (more teeth) increases acceleration and low-end torque, while a smaller sprocket raises top-end speed — making this a versatile tuning component for riders looking to dial in their gearing.