Vortex 313ZB-49 CAT5 Aluminum Rear Sprocket 520 Pitch 49T Black

The Vortex 313ZB-49 is a CAT5 aluminum rear sprocket featuring a 520 chain pitch and 49 teeth, finished in a black anodized color with contrasting silver machine-cut highlights. Designed for serious street and track riders, this sprocket delivers a premium upgrade over stock steel sprockets in both weight savings and longevity.

Key Features:

• Lightweight CAT5 aluminum construction — reduces rotating mass for improved acceleration and throttle response
• 100% CNC manufactured in the U.S.A. — machined to precise tolerances for true concentricity
• Specially formulated aluminum alloy per Vortex specifications for maximum durability
• Patented saber tooth groove design — unique tooth profile increases sprocket longevity and chain engagement
• Black anodized finish with contrasting silver machine cuts on sweeps, mud grooves, and teeth excluded from anodizing for a distinctive two-tone appearance
• 520 chain pitch — compatible with standard 520 drive chain setups
• 49-tooth rear sprocket — ideal for tuning final drive ratio toward increased low-end acceleration

Vortex Racing sprockets are trusted by professional race teams worldwide and are engineered to the tightest tolerances in the industry. The CAT5 series offers the performance and aesthetics of a true racing sprocket for both track days and spirited street riding.