| 摘要 |
A vehicle including: a vehicle body for supporting an intended user, the vehicle body defining a body front end, a body rear end and a body longitudinal axis; a front wheel and a rear wheel, the front and rear wheels being rotatably mounted to the vehicle body respectively substantially adjacent the body front and rear ends so as to be rotatable respectively about a front wheel rotation axis and a rear wheel rotation axis orientable substantially parallel to each other and substantially perpendicular to the body longitudinal axis; an auxiliary wheel mounted to the vehicle body so as to be rotatable about an auxiliary wheel rotation axis angled with respect to the front and rear wheel rotation axes; the auxiliary wheel being movable between a retracted position and an extended position relative to the vehicle body, wherein, when the vehicle is operatively supported on the ground surface by the front and rear wheels, the auxiliary wheel is closer to the ground surface in the extended position than in the retracted position.
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