Vortex 312DZR-40 Black Aluminum Rear Sprocket 40-Tooth

The Vortex 312DZR-40 is a 40-tooth rear sprocket machined from lightweight 7075-T6 billet aluminum and finished in Vortex's signature DZR black PTFE hardcoat anodizing. The PTFE coating bonds directly to the aluminum substrate, creating a harder, more durable surface with reduced friction compared to standard anodizing — ideal for high-demand racing and street performance applications.

Key Features:

• 40-tooth rear sprocket for precise gearing adjustments
• 100% CNC machined in the USA from 7075-T6 billet aluminum
• DZR black PTFE hardcoat finish — bonds to aluminum for increased durability and reduced friction
• Saber tooth groove design extends sprocket service life
• Vortex patented tooth profile for superior chain engagement and longevity
• Lightweight construction reduces unsprung rotational mass
• Designed and manufactured to tight tolerances for consistent performance

Vortex Racing has been producing championship-proven motorcycle components for Motocross, Supercross, Road Racing, Flat Track, and Minibikes from their U.S.-based facility for over 15 years. Each sprocket is tested with direct input from top professional race teams worldwide.