Vortex 212ZK-39 CAT5 520 Aluminum Rear Sprocket 39 Tooth Black

The Vortex 212ZK-39 is a high-performance aluminum rear sprocket designed for serious riders who demand quality and durability. This CAT5 series sprocket features 39 teeth and is engineered for 520 pitch chain applications, making it an excellent upgrade from heavier OEM steel sprockets.

Key Features:

• Constructed from aerospace-grade 7075 T6 aluminum for exceptional strength-to-weight ratio
• CNC-machined to precise tolerances for improved concentricity and quiet operation
• Black anodized finish provides corrosion resistance and sleek appearance
• Patented Vortex tooth design with Saber tooth grooves increases sprocket longevity
• Lightweight construction reduces rotating mass for improved acceleration and handling
• 520 pitch configuration allows for narrower, lighter drivetrain setup

Vortex Racing has earned a reputation among professional race teams worldwide for manufacturing sprockets to the tightest tolerances in the industry. The reduced weight compared to steel sprockets frees up horsepower and reduces gyroscopic forces, giving riders a noticeable performance advantage on the track or street.