A tridem axle is a type of axle configuration commonly used in heavy vehicles, such as trucks and trailers. It consists of three axles grouped closely together, which helps distribute the vehicle's weight more evenly across the road. This design can improve stability and reduce wear on tires, making it a popular choice for transporting heavy loads. Tridem axles are often found in commercial vehicles and construction equipment, where carrying large weights is essential. By using a tridem axle, manufacturers can comply with weight regulations while enhancing the vehicle's performance and safety on the road.