Commonly Used Terms
For easier reading, we may use ATV to refer to All-Terrain Vehicles.
According to Oregon law, an ATV is a two- to eight-wheeled vehicle that has a motor and is designed for riding on unpaved surfaces. ATVs include off-road motorcycles and side-by-sides (UTVs), but not snowmobiles. Oregon divides ATVs into four classes.
- Class I ATV has a maximum width of 50 inches, a maximum dry weight of 1,200 pounds, three or more inflatable tires, handlebars for steering, and a seat designed to be straddled by the operator. Also known as quads and 3-wheelers.
- Class II ATV weighs more than or is wider than a Class I ATV and is not a Class IV ATV. Also known as 4x4s and includes trucks, Jeeps, SUVs, dune buggies, and sand rails.
- Class III ATV is an off-road or off-highway motorcycle (ORM or OHM) with two tires.
- Class IV ATV has a maximum width of 65 inches, a maximum dry weight of 1,800 pounds, four or more inflatable tires, a steering wheel for steering, and non-straddle seating. Also known as side-by-sides or UTVs.
The general information in this course applies to all types of off-highway vehicles. Much of the specific information, however, applies primarily to ATVs.