Vortex 920ZR-39 VTX Aluminum Rear Sprocket 39T Red 920 Chain

The Vortex 920ZR-39 is a lightweight, CNC-machined aluminum rear sprocket featuring a 39-tooth count designed for 920 chain pitch applications. Finished in a striking red anodize, this sprocket delivers an ideal blend of reduced rotating mass and race-proven durability for street and performance riders alike.

Key Features:

• 100% CNC-machined in the USA from aerospace-grade aluminum alloy per Vortex's proprietary specifications
• Red anodized finish for corrosion resistance and a distinctive appearance
• 39-tooth rear sprocket for precise gear ratio tuning
• 920 chain pitch compatibility for large-format drivetrain applications
• Vortex patented tooth profile engineered to maximize sprocket longevity and chain engagement
• Significantly lighter than OEM steel sprockets, reducing unsprung and rotating weight

Vortex Racing sprockets are manufactured in the United States and used by professional racers and performance-focused street riders worldwide. The 920ZR-39 is a direct bolt-on upgrade that allows riders to fine-tune their gear ratio for improved acceleration or top-speed performance without compromising reliability.