Vortex 151ZK-45 CAT5 Aluminum Rear Sprocket 420 Pitch 45 Tooth Black

The Vortex 151ZK-45 is a lightweight, high-performance 420 pitch aluminum rear sprocket with 45 teeth in a black anodized finish. Engineered for riders who demand race-proven drivetrain components, this sprocket is CNC-machined in the USA from a specially formulated aluminum alloy developed to Vortex's exacting standards.

Vortex's CAT5 aluminum construction significantly reduces rotating mass compared to OEM steel sprockets, translating into improved throttle response, quicker acceleration, and sharper handling. The sprocket features strategically placed lightening holes to further minimize weight without sacrificing structural integrity. Vortex's patented tooth profile is designed to extend sprocket longevity and promote smoother chain engagement throughout the life of the component.

Key Features:

• 420 Chain Pitch — matches standard 420 chain applications
• 45 Teeth — optimized for improved low-end acceleration and torque delivery
• Lightweight aluminum construction — reduces rotating mass versus stock steel sprockets
• Lightening holes — additional weight reduction for maximum performance
• Black anodized finish — corrosion-resistant and race-ready appearance
• CNC-machined in the USA — precision fitment and consistent quality
• Vortex patented tooth design — extends sprocket life and reduces chain wear
• Specially formulated alloy — developed per Vortex Racing specifications

Vortex Racing is trusted by professional race teams worldwide and is a benchmark brand for sprocket quality in the powersports industry. The 151ZK-45 is a direct bolt-on upgrade designed to deliver measurable performance gains over stock gearing.