Vortex 425ZR-39 Aluminum Rear Sprocket 39 Tooth 425 Chain

The Vortex 425ZR-39 is a high-performance aluminum rear sprocket designed for 425 chain applications. Featuring 39 teeth, this lightweight sprocket is engineered for sport and racing motorcycles where weight reduction and precision are critical.

Key Features:

• 39-tooth aluminum construction reduces unsprung and rotating mass
• Designed for 425 pitch chain applications
• Vortex patented tooth profile optimizes chain engagement and extends service life
• CNC-machined from aerospace-grade aluminum for precise concentricity
• Strategic lightening holes reduce weight without compromising strength
• Hard anodized finish for enhanced durability and corrosion resistance

Vortex sprockets are manufactured in the USA to the tightest tolerances using premium materials. Each sprocket undergoes rigorous quality control to ensure proper fitment and performance. The unique tooth design promotes smooth chain engagement and release, reducing wear on both the chain and sprocket for extended component life.