Vortex 253ZK-51 CAT5 Aluminum Rear Sprocket 520 Pitch 51-Tooth Black

The Vortex 253ZK-51 is a CAT5 lightweight aluminum rear sprocket featuring a 520 chain pitch and 51 teeth, finished in a black anodized color with contrasting silver machine-cut highlights. Designed for performance-minded riders and racers, this sprocket is part of Vortex Racing's flagship CAT5 lineup — engineered and manufactured entirely in the USA.

Key Features:

• Lightweight CAT5 aluminum construction — reduces rotating mass for improved throttle response and acceleration
• 100% CNC manufactured in the U.S.A. to precise tolerances
• Specially formulated alloy per Vortex specifications for optimal strength-to-weight ratio
• Patented Vortex sprocket design with saber tooth grooves for increased sprocket longevity
• Color anodized finish (black) with bright silver highlights on sweeps and machined surfaces
• 520 chain pitch — compatible with 520-pitch drive chains
• 51-tooth rear sprocket — optimized for increased low-end torque and acceleration

Vortex Racing has been producing top-quality motorcycle racing components for Motocross, Supercross, Road Racing, and Flat Track for over 15 years. Each component is tested on the track with feedback from professional race teams worldwide, ensuring race-proven performance and reliability.