Vortex 151ZK-49 CAT5 520 Aluminum Rear Sprocket 49T Black

The Vortex 151ZK-49 is a CAT5 aluminum rear sprocket featuring a 520 pitch and 49 teeth in a black anodized finish. Designed as a direct performance upgrade over heavy OEM steel sprockets, it delivers reduced rotating mass for improved acceleration and sharper throttle response.

Key Features:

• Lightweight CAT5 aluminum construction — significantly lighter than stock steel sprockets, reducing unsprung and rotating weight
• 100% CNC manufactured in the U.S.A. for precise tolerances and consistent quality
• Specially formulated alloy engineered to Vortex specifications for optimal strength-to-weight ratio
• Saber tooth groove design — Vortex patented tooth profile that increases sprocket longevity and chain engagement
• Black anodized finish with contrasting silver machine cuts on sweeps and mud grooves for a distinctive appearance
• 520 pitch — compatible with 520-series chains
• 49 teeth rear sprocket sizing

The CAT5 series utilizes Vortex's color anodizing process that excludes sweeps, mud grooves, and teeth, resulting in bright silver highlights against the black body. This sprocket is vehicle-specific — always verify fitment before ordering.