
A single-track vehicle is a
vehicle
A vehicle (from la, vehiculum) is a machine that transports people or cargo. Vehicles include wagons, bicycles, motor vehicles ( motorcycles, cars, trucks, buses, mobility scooters for disabled people), railed vehicles ( trains, trams ...
that leaves a single ground track as it moves forward. Single-track vehicles usually have little or no lateral stability when stationary but develop it when moving forward or controlled. In the case of wheeled vehicles, the front and rear wheel usually follow slightly different paths when turning or when out of alignment.
Single-track vehicles have unique
dynamics that, in the case of wheeled vehicles, are discussed at length in
bicycle and motorcycle dynamics, that usually require leaning into a turn, and that usually include
countersteering. Single-track vehicles can roll on wheels, slide, float, or
hydroplane.
Wheeled
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bicycle,
tandem bicycle,
tall bike
A tall bike is an unusually tall bicycle often constructed by hobbyists from spare parts. Typically, two conventional bicycle frames are connected, by welding, brazing, or other means, one atop the other. The drive train is reconfigured to conn ...
, and
recumbent bicycle
A recumbent bicycle is a bicycle that places the rider in a laid-back reclining position. Most recumbent riders choose this type of design for ergonomic reasons: the rider's weight is distributed comfortably over a larger area, supported by ba ...
*
motorcycle
A motorcycle (motorbike, bike, or trike (if three-wheeled)) is a two or three-wheeled motor vehicle steered by a handlebar. Motorcycle design varies greatly to suit a range of different purposes: long-distance travel, commuting, cruisin ...
,
scooter, and
feet forwards motorcycle
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gyrocar and
gyro monorail
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kick scooter
A kick scooter (also referred to as a push-scooter or scooter) is a human-powered street vehicle with a handlebar, deck, and wheels propelled by a rider pushing off the ground with their leg. Today the most common scooters are made of aluminum, ...
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unicycle
A unicycle is a vehicle that touches the ground with only one wheel. The most common variation has a frame with a saddle, and has a pedal-driven direct-drive. A two speed hub is commercially available for faster unicycling. Unicycling is practi ...
,
self-balancing unicycle
An electric unicycle (often initialized as EUC or acronymized yuke or Uni) is a self-balancing personal transporter with a single wheel. The rider controls speed by leaning forwards or backwards, and steers by twisting or tilting the unit side to ...
,
Uno (dicycle), and
monowheel
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inline skate
Inline skates are a type of roller skate used for inline skating. Unlike quad skates, which have two front and two rear wheels, inline skates typically have two to five wheels arranged in a single line. Some, especially those for recreation, ...
and
roller ski (when only one is in contact with the ground or when the second follows behind the first)
Sliding
*the
snowboard
Snowboards are boards where the user places both feet, usually secured, to the same board. The board itself is wider than most skis, with the ability to glide on snow."snowboarding." Dictionary.com Unabridged (v 1.1). Random House, Inc. 17 Ma ...
and
monoski
*the
skirider A Skirider is a kind of scooter designed to work on snow in 2002 by 2004 British inventor of the year Andrew Hubert winning Platinum for design and Gold leisure. It was invented to make the slopes more accessible to people whose physical limitations ...
*the
ice skate (when only one is in contact with the ice or when the second follows behind the first)
Intermittent contact
*the
pogo stick
*the
bipedal robot
Bipedalism is a form of terrestrial locomotion where an organism moves by means of its two rear limbs or legs. An animal or machine that usually moves in a bipedal manner is known as a biped , meaning 'two feet' (from Latin ''bis'' 'double' a ...
Hydroplaning
*the
slalom water ski
*the
wakeboard
Narrow-track vehicle
A vehicle is approximately single-track when the
axle track is small enough with respect to the
center of mass height to require leaning into a turn. Countersteering may or may not be required.{{Citation needed, date=October 2015
*the
skateboard
A skateboard is a type of sports equipment used for skateboarding. They are usually made of a specially designed 7-8 ply maple plywood deck and polyurethane wheels attached to the underside by a pair of skateboarding trucks.
The skateboar ...
and all its varieties, such as the
snakeboard
*the
surfboard
A surfboard is a narrow plank used in surfing. Surfboards are relatively light, but are strong enough to support an individual standing on them while riding an ocean wave. They were invented in ancient Hawaii, where they were known as ''papa he' ...
*the
caster board (when the rear wheel closely follows the front wheel)
*the
Uno dicycle
The Uno is a novel self-balancing electric motorcycle using two wheels side by side (the configuration used by dicycles). The Uno III adds a third wheel that allows it to transform into a tricycle.
Description
The original Uno is controlled in ...
See also
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Dicycle
A dicycle () (also known as a diwheel) is a vehicle with two parallel wheels, side by side, unlike single-track vehicles such as motorcycles and bicycles, which have two wheels inline. Originally used to refer to devices with large wheels and pe ...
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List of land vehicles types by number of wheels
Vehicles by type