Vortex 3278-15 Steel 15-Tooth 520-Pitch Front Sprocket

The Vortex 3278-15 is a 15-tooth, 520-pitch steel front sprocket (countershaft sprocket) engineered for demanding street and racing applications. Built by Vortex Racing — a U.S.-based manufacturer with decades of motorsport heritage — this sprocket delivers the precision and durability required by professional race teams and serious riders alike.

Key Features:

• High carbon steel construction for maximum tensile strength and long service life
• Induction hardened tooth surfaces to resist wear and extend sprocket life
• Special Vortex nickel plating protects against corrosion and rust
• Drilled lightening holes reduce rotating mass for improved throttle response and drivetrain efficiency
• Precision-machined to tight tolerances to ensure concentricity, minimizing vibration and chain wear
• 520 pitch — compatible with standard 520 drive chains
• 15 teeth — stock replacement count for supported applications

Vortex front sprockets are precision manufactured and track-tested with direct feedback from top professional race teams worldwide. Each component is held to the tightest tolerances using the best quality materials in the industry, resulting in a stronger, quieter, and longer-lasting sprocket compared to many OEM alternatives.