Vortex 523ZK-40 CAT5 Aluminum Rear Sprocket 520 Pitch 40-Tooth Black

The Vortex 523ZK-40 is a CAT5 aluminum rear sprocket featuring a 520 pitch and 40 teeth in a black anodized finish. Designed for performance street and track riders, this sprocket delivers an ideal balance of weight savings and reliable power transfer.

Key Features:

• 520 Pitch — Compatible with standard and 520-conversion chain setups
• 40-Tooth rear sprocket for stock or tuned gear ratio configurations
• Lightweight CAT5 aluminum construction reduces rotating mass for improved throttle response
• 100% CNC manufactured in the USA to precise tolerances
• Black anodized finish resists corrosion and provides a clean, aggressive appearance
• Patented Vortex tooth profile extends sprocket longevity over conventional designs
• Specially formulated alloy per Vortex Racing specifications

Vortex Racing sprockets are trusted by professional and amateur racers alike for their superior craftsmanship and consistent performance. The 523ZK-40 is an excellent choice for riders looking to maintain stock gearing or fine-tune acceleration and top-end speed characteristics.