This document describes the design and analysis of the suspension system, brakes, and wheel assembly for an all-terrain vehicle (ATV). Key aspects of the design included improving vehicle handling, increasing ride height and wheel travel, and improving component durability. Suspension and brake systems were analyzed using Solidworks and Lotus simulation software. Design objectives such as performance, safety, manufacturability, and cost were prioritized. The suspension utilized double wishbone design with parameters like camber and castor optimized. Brake calculations were performed to select the master cylinder and calipers. The wheel assembly was designed to reduce unsprung mass while maintaining performance.