Vortex 203B-43 Aluminum Rear Sprocket 43-Tooth

The Vortex 203B-43 is a high-performance 43-tooth aluminum rear sprocket designed for serious street and track riders who demand precision, durability, and reduced rotating mass. Manufactured by Vortex Racing — a USA-based company with over two decades of motorsports engineering experience — this sprocket delivers the tight tolerances and superior materials that professional race teams rely on worldwide.

Key Features:

• 43-Tooth Rear Sprocket — optimized gearing for a balance of acceleration and top-end performance
• Lightweight Aluminum Construction — reduces unsprung and rotating weight compared to steel alternatives
• 100% CNC Manufactured in the USA — machined to the tightest tolerances for precise fit and consistent performance
• Specially Formulated Alloy — engineered to Vortex's proprietary specifications for maximum strength-to-weight ratio
• Patented Tooth Design — unique profile promotes smooth chain engagement and extends sprocket service life
• Anodized Finish — provides corrosion resistance and long-lasting appearance

Vortex Racing sprockets are developed with direct feedback from top professional race teams and validated on the track before reaching consumers. The 203B-43 is a direct-fit replacement sprocket — no modifications required for compatible applications. Whether upgrading for the track or replacing worn OEM components, the Vortex 203B-43 is a proven choice for performance-minded riders.