Vortex 839AKV4-39 VTX Aluminum Rear Sprocket 39T

The Vortex 839AKV4-39 is a 39-tooth VTX series aluminum rear sprocket designed for performance-minded riders who demand lightweight, durable drivetrain components. Machined from high-grade 7075-T6 aluminum, this sprocket delivers an excellent strength-to-weight ratio over stock steel sprockets, reducing unsprung and rotating mass for improved throttle response and acceleration.

Key Features:

• 39-Tooth Configuration – Precise tooth count for optimized final drive gearing
• Aircraft-Grade 7075-T6 Aluminum Construction – Lightweight yet strong, significantly reducing rotational weight vs. OEM steel
• Hard Anodized Finish – Provides corrosion resistance and extended wear life
• CNC Machined – Precision manufacturing ensures accurate tooth profile and consistent chain engagement
• VTX Series Design – Features Vortex's proven spoke and relief-cut pattern for maximum weight reduction without sacrificing rigidity
• Direct OEM Replacement Fitment – Bolt-on installation with no modifications required
• Compatible with Standard O-Ring, X-Ring, and Z-Ring Chains

Vortex Racing is a trusted name in the motorcycle performance and racing community, manufacturing sprockets to exacting tolerances in their USA facility. The 839AKV4-39 rear sprocket is an ideal upgrade for track day enthusiasts, club racers, and street riders looking to optimize their motorcycle's drivetrain performance with a quality, American-made component.