A dead axle is a type of axle that does not provide any power to the wheels it supports. Instead, it simply serves as a structural component, helping to support the weight of the vehicle and maintain its stability. Dead axles are commonly found in vehicles like trucks and trailers, where they help distribute weight evenly. Unlike live axles, which are connected to the vehicle's drivetrain and can drive the wheels, dead axles do not rotate with the wheels. This makes them simpler and often more durable, as they do not experience the same wear and tear from power transmission.