Vortex 839AZRV4-39 VTX Aluminum Rear Sprocket 39T

The Vortex 839AZRV4-39 is a 39-tooth aluminum rear sprocket from Vortex's VTX series, engineered for riders seeking a lightweight, high-performance alternative to stock steel sprockets. Precision-machined from 7075-T6 aerospace-grade aluminum and hard anodized for corrosion resistance, this sprocket delivers exceptional strength-to-weight savings without sacrificing durability.

Key Features:

• 39-tooth rear sprocket for precise final drive ratio tuning
• Machined from 7075-T6 aluminum for maximum strength and minimal weight
• Hard anodized finish for superior corrosion and wear resistance
• Lightening pockets reduce rotating mass for improved acceleration response
• CNC precision-machined to tight tolerances for smooth, quiet chain engagement
• Compatible with standard O-ring, X-ring, and Z-ring chains
• Direct OEM bolt-on replacement — no modifications required

Vortex is a trusted name in the powersports industry, manufacturing sprockets to exacting standards for street, track, and off-road applications. The 839AZRV4-39 is a direct-fit replacement that allows riders to fine-tune gearing for improved low-end torque or top-speed performance depending on application needs.