Vortex 505ZB-51 Black Aluminum 520-Pitch 51-Tooth Rear Sprocket

The Vortex 505ZB-51 is a 51-tooth, 520-pitch aluminum rear sprocket finished in black anodizing, built for street and performance motorcycle applications. Manufactured in the USA by Vortex Racing, this sprocket is precision-machined to exacting tolerances for optimal chain engagement and consistent power transfer.

Key Features:

• 51-Tooth / 520 Chain Pitch — compatible with standard 520-pitch drive chains
• Black Anodized Finish — anodized aluminum construction resists corrosion and provides a sharp, aggressive appearance
• Lightweight Aluminum Construction — reduces rotating mass compared to steel sprockets, improving throttle response and overall performance
• Lightening Holes — strategically placed cutouts further reduce weight without sacrificing structural integrity
• Vortex Patented Tooth Design — unique tooth geometry increases sprocket longevity and improves chain engagement
• 100% CNC Machined — manufactured in the USA to precise specifications for concentricity and durability
• Specially Formulated Alloy — produced to Vortex's own material specifications for optimal strength-to-weight ratio

The 505ZB-51 is ideal for riders seeking a lightweight, durable rear sprocket upgrade with a blacked-out aesthetic. As part of Vortex Racing's trusted lineup, this sprocket has been proven on tracks across Motocross, Supercross, Road Racing, and Flat Track disciplines.