Vortex 635ZB-40 Black 40-Tooth 530 Aluminum Rear Sprocket

The Vortex 635ZB-40 is a lightweight aluminum rear sprocket featuring a 40-tooth, 530 chain pitch configuration with a sleek black anodized finish. Engineered for performance street and track riders, this sprocket is part of Vortex's renowned 635 series and delivers the precision and durability that Vortex Racing is known for.

Manufactured entirely in the USA, Vortex rear sprockets are CNC-machined from a specially formulated aluminum alloy to exacting tolerances. The black anodized finish provides corrosion resistance while giving the sprocket an aggressive, race-inspired appearance. The patented tooth profile is designed to maximize chain engagement life and reduce wear on both the sprocket and chain.

Key Features:

• 40 teeth — tuned for a balance of acceleration and top-end performance
• 530 chain pitch — compatible with standard 530-series drive chains
• Black anodized finish — corrosion-resistant and race-ready appearance
• Lightweight aluminum construction reduces rotating mass
• 100% CNC manufactured in the USA
• Specially formulated alloy per Vortex specifications
• Vortex patented tooth design for increased sprocket longevity

Vortex Racing has been supplying championship-level drivetrain components for Superbike, AMA, and Motocross competition for over 15 years. The 635ZB-40 rear sprocket is a direct, bolt-on upgrade designed to improve throttle response and drivetrain efficiency.