A third axle, usually with four wheels, mounted at the rear of a standard tandem. Typically a tag axle lifts up to be taken out of a load carrying capacity.
U.S. classification for passenger vehicle emissions. The classification is based on producing 90% less emissions than an equivalent gasoline-powered vehicle. Abbreviated as SULEV.
A stern drive or inboard/outboard drive (I/O) is a form of marine propulsion. The engine is located inboard just forward of the transom (stern) and provides power to the drive unit (outdrive) [...]