Vortex 817ZR-50 Steel Rear Sprocket Pitch Sprockets - 520 50-Tooth Black

The Vortex 817ZR-50 is a 520-pitch, 50-tooth steel rear sprocket finished in an electro-plated satin black coating for corrosion resistance. Engineered for performance-oriented street and track riders, this sprocket is precision CNC-machined to exacting tolerances, ensuring true concentricity for smooth, quiet operation and consistent chain engagement.

Key Features:

• 520 Pitch: Designed for use with standard 520-pitch drive chains
• 50-Tooth Configuration: Delivers increased low-end torque and acceleration compared to stock gearing
• High-Tensile Carbon Steel Construction: Hardened teeth resist wear and maintain shape over extended use
• Electro-Plated Satin Black Finish: Protects against corrosion and harsh riding conditions
• Precision CNC Machined: Manufactured to tight tolerances for perfect concentricity and reliable chain tracking
• Lightening Holes: Strategic cutouts reduce overall rotating mass for improved throttle response
• Direct OEM Replacement Profile: Designed to bolt on using factory hardware

Vortex Racing sprockets are developed and tested with professional race teams worldwide, making the 817ZR-50 a proven upgrade for riders seeking improved acceleration and durable drivetrain performance.