Vortex 165-45 420-Pitch 45-Tooth Aluminum Rear Sprocket

The Vortex 165-45 is a 420-pitch, 45-tooth aluminum rear sprocket engineered for performance-minded riders who demand precision-built drivetrain components. Manufactured 100% in the USA, this sprocket is crafted from a specially formulated aluminum alloy per Vortex's exacting specifications, delivering an optimal balance of strength and weight savings over heavier steel alternatives.

Key Features:

• 420 Chain Pitch — designed for small-displacement and lightweight motorcycle applications
• 45 Teeth — provides increased rear-wheel torque and improved low-end acceleration
• Lightweight aluminum construction — reduces rotating mass to improve throttle response and overall performance
• 100% CNC manufactured in the USA — ensures tight tolerances and consistent concentricity
• Specially formulated alloy — developed to Vortex's proprietary material specifications for durability
• Unique patented tooth design — engineered to extend sprocket longevity and reduce chain wear
• Anodized finish — helps prevent oxidation and corrosion for lasting appearance

Vortex Racing has been producing top-quality motorcycle racing components since 1995, with products validated by professional race teams worldwide across disciplines including road racing, motocross, flat track, and supercross. The 165-45 rear sprocket is a direct-fit replacement and performance upgrade suitable for street and track use.