Vortex 505ZB-47 520-Pitch 47-Tooth Black Aluminum Rear Sprocket

The Vortex 505ZB-47 is a 520-pitch, 47-tooth rear sprocket machined from lightweight aluminum and finished in a satin black anodize. Engineered by Vortex Racing — a U.S.-based manufacturer owned and operated by motorcycle racers — this sprocket delivers the precision, durability, and performance demanded by both competitive track riders and serious street enthusiasts.

Key Features:

• 520 Pitch: Designed for use with standard 520-pitch drive chains
• 47 Teeth: Increases rear wheel torque and low-end acceleration relative to stock gearing
• Lightweight Aluminum Construction: Reduces rotating mass to improve throttle response and overall drivetrain efficiency
• Black Anodized Finish: Electroplated satin black coating resists corrosion and provides a clean, aggressive aesthetic
• Patented Tooth Design: Vortex's unique tooth geometry increases sprocket longevity and promotes smooth chain engagement
• 100% CNC Machined: Manufactured to tight tolerances for improved concentricity, quieter operation, and extended service life
• Track-Proven: Tested with direct feedback from top professional race teams worldwide

The 505ZB-47 is an ideal choice for riders looking to fine-tune their gear ratio for improved off-the-line acceleration. As part of the Vortex 505ZB aluminum sprocket series, it is available across a wide range of tooth counts to suit a variety of applications and gearing preferences.