Two-wheeler

A two-wheeler is a vehicle that runs on two wheels.
The two wheels may be arranged in tandem, one behind the other, as with single-track vehicles, or arranged side by side, on the same axle. If on the same axle, the vehicle may be have no other support, as with dicycles, or have additional support, which is often also the source of motive power.
Wheeled single-track vehicles include:
Dicycles include:
Two-wheelers intended to be used with additional support, which is also the source of motive power, include:
Two-wheelers intended to be used with additional support, which is not the source of motive power, include: