Vortex 312ZR-49 Black Hardcoat Aluminum Rear Sprocket 520 Pitch 49 Tooth

The Vortex 312ZR-49 is a 520-pitch, 49-tooth black hardcoat aluminum rear sprocket precision-engineered for motorcycle applications. CNC-machined from 7075-T6 aluminum, this sprocket delivers an exceptional strength-to-weight ratio, significantly reducing unsprung and rotational mass compared to steel alternatives.

The ZR black hardcoat finish uses a Type III hard anodizing process followed by a PTFE (polytetrafluoroethylene) coating, resulting in a surface that is harder, more wear-resistant, and self-lubricating. This F5 hardcoat treatment extends sprocket life, repels grime, and maintains performance under demanding street and track conditions.

Key Features:

• 520 pitch — compatible with standard 520 chains
• 49 teeth — suited for gearing adjustments focused on acceleration and low-end torque
• 7075-T6 aluminum construction — aerospace-grade alloy for maximum strength and minimal weight
• 100% CNC machined — ensures precise concentricity and consistent chain engagement
• F5 Black Hardcoat (PTFE) — Type III hard anodized with PTFE coating for added lubricity, durability, and corrosion resistance
• Vortex patented tooth profile — unique geometry designed to extend sprocket and chain life
• Lightening holes and scalloped design reduce rotating mass

The Vortex 312ZR-49 is a direct-fit rear sprocket replacement offering improved performance and longevity over OEM components, making it an ideal upgrade for both aggressive street riding and track use.