Vortex 491A-40 Silver 40-Tooth 520-Pitch Aluminum Rear Sprocket

The Vortex 491A-40 is a 40-tooth, 520-pitch aluminum rear sprocket engineered for performance motorcycle applications. Machined from lightweight 7075-T6 billet aluminum, this sprocket delivers an exceptional strength-to-weight ratio compared to steel alternatives, helping reduce unsprung rotational mass for improved throttle response and handling.

Key Features:

• 40-tooth, 520-pitch rear sprocket configuration
• CNC machined from 7075-T6 billet aluminum for maximum strength and minimal weight
• Vortex saber tooth groove design for increased sprocket longevity
• Available in silver anodized finish with optional PTFE black hardcoat — a surface treatment bonded to the aluminum for enhanced durability and reduced friction
• Vortex patented tooth profile for superior chain engagement and wear resistance
• Precision manufactured to tight tolerances for improved concentricity and quiet, smooth operation

The Vortex 491A-40 is a direct-fit rear sprocket designed for riders seeking a reliable OEM-replacement or performance upgrade. The 40-tooth count provides a balanced gearing ratio suitable for a wide range of riding conditions, from street to track use.