Vortex 208ZK-50 CAT5 Aluminum Rear Sprocket Black 520 Pitch 50T

The Vortex 208ZK-50 is a CAT5 aluminum rear sprocket finished in black anodize with a 520 pitch and 50-tooth count. First introduced in 1995, the CAT5 has become one of the most recognized sprocket designs in motorcycle racing and street performance.

This sprocket features Vortex's patented design and is 100% CNC machined in the U.S.A. from a specially formulated aluminum alloy developed to Vortex's own specifications. The black anodized finish is applied before cutting, producing the iconic two-tone look — bold black body with bright silver machined highlights on the sweeps, mud grooves, and teeth.

Key Features:

• Lightweight CAT5 aluminum racing sprocket — reduces unsprung and rotational weight
• 100% CNC manufactured in the U.S.A.
• Specially formulated aluminum alloy per Vortex specifications
• Patented saber tooth groove design increases sprocket longevity
• Black anodized finish with contrasting silver machined highlights
• 520 pitch, 50-tooth rear sprocket
• Vortex patented sprocket design unlike any other on the market

The 520 pitch makes this sprocket well-suited for bikes running a lightweight chain conversion or OEM 520 setups, saving rotational weight for improved throttle response. The 50-tooth count provides a higher final drive ratio for increased low-end acceleration and stronger mid-range pull.