Vortex 165ZK-31 Steel Rear Sprocket 31-Tooth

The Vortex 165ZK-31 is a steel rear sprocket with a 31-tooth count, engineered for reliable performance on the street or track. Vortex steel rear sprockets are manufactured from a specially formulated carbon steel alloy and finished with a silver electro-plated or satin black coating to resist corrosion and extend service life.

Key Features:

• 31-Tooth rear sprocket for precise gear ratio tuning
• Carbon steel alloy construction per Vortex specifications for strength and durability
• Vortex patented unique tooth design for increased sprocket longevity
• Corrosion-resistant finish — silver anodized or electro-plated satin black
• Direct OEM replacement fitment for compatible applications

Steel rear sprockets are the dependable choice for everyday street riders, offering approximately twice the service life of an equivalent aluminum sprocket. The Vortex tooth profile is designed to reduce chain wear and maintain consistent power transfer throughout the sprocket's lifespan. As with all chain drive components, replacing the front sprocket, rear sprocket, and chain together as a set is recommended for optimal wear and performance.