Vortex 452AZB-37 CAT5 Rear Aluminum Sprocket Blue 37-Tooth 520-Pitch

The Vortex 452AZB-37 is a CAT5 series rear aluminum sprocket featuring a 37-tooth count and 520-pitch chain compatibility, finished in a striking anodized blue. Designed for performance riders and racers who demand lightweight precision hardware, this sprocket is manufactured in the USA to exacting tolerances.

Vortex's CAT5 anodizing process applies the color finish before CNC machining, producing the iconic two-tone look — vivid blue anodized panels with bright contrasting silver machine-cut teeth, sweeps, and grooves. The result is a functional, race-ready sprocket with undeniable visual appeal.

Key Features:

• 520-Pitch rear sprocket — 37 teeth
• Lightweight CAT5 aluminum racing construction — significantly lighter than steel equivalents
• 100% CNC manufactured in the U.S.A. to precise tolerances
• Specially formulated alloy per Vortex specifications for optimum strength-to-weight ratio
• Anodized blue finish applied before CNC machining for a distinctive two-tone appearance with silver highlights
• Saber tooth grooves — Vortex patented tooth design increases sprocket longevity
• Available in multiple colors with contrasting silver machine cuts

As with all aluminum sprockets, proper chain maintenance is essential. Vortex recommends cleaning and checking chain tension every 300–400 miles to maximize the service life of this sprocket. Ideal for road racing, track days, and performance street riding where reduced rotational mass translates directly to improved throttle response and acceleration.