The average weight of an all-terrain vehicle (ATV) is around 350 to 400 pounds. The weight normally differs according to make. An ATV is a vehicle that travels on low pressure tires, with a seat that is straddled by the operator.
By the current definition, ATVs are intended for use by a single operator, although some companies have developed ATVs intended for use by the operator and one passenger. The engine size of ATVs ranges from 49 cubic centimeters to 1,000 cubic centimeters (3 to 61 cubic inches). As with a motorcycle, the rider sits on and operates the ATV, but the additional wheels on the ATV provide more stability to the vehicle at slower speeds.