Tandem axles consist of two axles positioned close together on a vehicle, typically found on larger trucks and trailers. This design helps distribute weight more evenly, improving stability and load-carrying capacity. Each axle usually has its own set of wheels, allowing for better traction and control, especially when carrying heavy loads. The use of tandem axles is common in commercial vehicles, such as semi-trucks and dump trucks, as they enhance performance on various terrains. By providing additional support, tandem axles reduce the risk of tire wear and improve overall safety during transportation.