Vortex 505ZB-45 CAT5 Black 45-Tooth 530-Pitch Aluminum Rear Sprocket

The Vortex 505ZB-45 is a CAT5 series aluminum rear sprocket featuring a black anodized finish, 45-tooth count, and 530-pitch chain compatibility. Designed and manufactured by Vortex Racing — a U.S.-based company with decades of motorsport heritage — this sprocket delivers the precision, durability, and weight savings demanded by serious street and track riders alike.

Vortex's CAT5 sprockets are CNC-machined to the tightest tolerances using a specially formulated aluminum alloy. The signature color anodizing is applied to the body while the tooth sweeps, mud grooves, and teeth remain in raw aluminum, creating a striking two-tone appearance. The patented Vortex tooth profile promotes even chain wear and extends overall drivetrain life.

Key Features:

• Pitch: 530
• Tooth Count: 45
• Finish: Black anodized aluminum (CAT5 series)
• 100% CNC manufactured in the USA
• Specially formulated aluminum alloy per Vortex specifications
• Patented unique tooth design increases sprocket longevity
• Lightweight construction reduces rotating mass for improved throttle response
• Color anodizing excludes tooth sweeps, mud grooves, and teeth for contrast styling

The Vortex 505ZB-45 is an ideal upgrade for riders looking to fine-tune their gearing ratio while saving weight over a stock steel sprocket. A 45-tooth rear sprocket on a 530-pitch drivetrain offers strong low-to-mid range pulling power suitable for both road use and track applications.