Vortex 828CZR-39 CAT5 Rear Sprocket 39 Tooth 520 Pitch

The Vortex 828CZR-39 is a high-performance CAT5 rear sprocket designed for serious riders who demand durability and precision. This 39-tooth sprocket features 520 pitch spacing and is manufactured from premium 7075-T6 aluminum alloy, offering an optimal balance of strength and weight savings over stock steel sprockets.

Key Features:

• CNC-machined from 7075-T6 aircraft-grade aluminum for maximum strength-to-weight ratio
• 39 teeth with 520 pitch configuration for precise chain engagement
• Hard-anodized finish in silver provides superior wear resistance and corrosion protection
• CAT5 (Category 5) design with weight-reducing cutouts that maintain structural integrity
• Precision tolerances ensure smooth power transfer and extended chain life
• Self-cleaning mud grooves help prevent debris buildup
• Laser-etched tooth count and Vortex branding for easy identification

Vortex CAT5 sprockets are engineered to meet or exceed OEM specifications while reducing rotating mass for improved acceleration and handling. The hard-anodized surface treatment extends sprocket life significantly compared to untreated aluminum, making this an excellent upgrade for street, track, and racing applications.