Vortex 828AZR-39 Aluminum Rear Sprocket 39T 428 Pitch

The Vortex 828AZR-39 is a high-performance aluminum rear sprocket featuring a 39-tooth count and 428 pitch chain compatibility. Engineered for competitive and street riders who demand lightweight precision, this sprocket is CNC-machined from high-grade 7075-T6 aluminum alloy for an optimal balance of strength and weight savings over a stock steel sprocket.

Key Features:

• 39-Tooth count for fine-tuning gearing and acceleration
• 428 pitch chain compatible
• CNC-machined from lightweight 7075-T6 aluminum alloy
• Hard anodized finish for corrosion resistance and extended service life
• Precision laser-cut tooth profile for smooth, consistent chain engagement
• Significantly lighter than OEM steel sprockets for improved power-to-weight ratio
• Manufactured to tight tolerances for OEM-equivalent fitment

Vortex Racing is a trusted name in the powersports industry, producing sprockets, clip-ons, and rearsets for both track and street applications. The 828AZR-39 is a direct bolt-on replacement designed to fit specific motorcycle applications — confirm fitment via Vortex's application guide before ordering.