Vortex 312DZK-40 Steel Rear Sprocket Black 40-Tooth

The Vortex 312DZK-40 is a 40-tooth steel rear sprocket finished in an electro-plated satin black coating for corrosion resistance. Engineered by Vortex Racing — a U.S.-based manufacturer with over 15 years of motorsports heritage — this sprocket is built to the same exacting standards trusted by professional race teams worldwide.

Key Features:

• Carbon steel alloy construction per Vortex specifications for maximum strength and durability
• Electro-plated satin black finish to prevent corrosion and provide a clean, aggressive appearance
• Patented Vortex tooth profile — a unique saber-tooth groove design that increases sprocket longevity compared to standard sprockets
• 40 teeth — allows fine-tuning of gear ratios for improved acceleration characteristics
• 100% CNC machined to tight tolerances for precise fitment and smooth chain engagement
• Designed for use with the matching chain pitch — ensure front sprocket, rear sprocket, and chain are all the same pitch

Vortex steel rear sprockets are an ideal choice for riders who demand OEM-level reliability with race-proven performance. Whether replacing a worn sprocket or re-gearing for a specific application, the 312DZK-40 delivers consistent, durable power transfer.