Vortex 190ZK-40 Steel Rear Sprocket 40-Tooth Black

The Vortex 190ZK-40 is a 40-tooth steel rear sprocket finished in a classic satin black. Engineered by Vortex Racing—a brand trusted by championship-level racers since 1995—this sprocket delivers the precision, durability, and consistency demanded by both track and street riders.

Key Features:

• 40-Tooth Steel Construction: High-carbon steel provides maximum strength and long service life under demanding conditions
• Black Finish: Electroplated satin black coating resists corrosion and maintains a clean appearance over time
• Induction Hardened Teeth: Surface hardening reduces wear while preserving core toughness for extended sprocket life
• Precision CNC Machined: Manufactured to tight tolerances to ensure concentricity and smooth, consistent chain engagement
• Direct OEM-Style Replacement: Designed as a direct bolt-on replacement for applicable models

Vortex steel rear sprockets are a proven choice for riders who want OEM-quality reliability with race-proven manufacturing standards. The 190ZK-40 is ideal for restoring stock gearing or fine-tuning final drive ratio for improved acceleration response.