Vortex 635ZK-39 Series Steel Rear Sprocket Sprockets - 630 39-Tooth

The Vortex 635ZK-39 is a 39-tooth steel rear sprocket designed for 630-pitch chain drive systems. Built to Vortex Racing's exacting standards, this sprocket is manufactured from high-grade carbon steel alloy and finished with a zinc plating process to resist corrosion and extend service life in demanding riding conditions.

Key Features:

• Chain Pitch: 630 series (heavy-duty large displacement applications)
• Tooth Count: 39 teeth
• Material: Carbon steel alloy per Vortex specifications
• Finish: Zinc-plated for corrosion resistance
• Unique tooth profile engineered to increase sprocket longevity and reduce chain wear
• Precision-manufactured to tight tolerances for smooth, concentric engagement
• Vortex patented sprocket tooth design for enhanced durability

Vortex Racing sprockets are a trusted choice for street and performance riders seeking a direct OEM replacement or gearing upgrade. The 630-pitch platform is common on larger displacement sport and cruiser motorcycles requiring a robust drive system capable of handling high torque loads.