The wheelbase of a car, bus, truck, motorcycle or bicycle is the distance from the centre of the front wheel to the centre of the back wheel — more exactly, from the front axle to the back axle. It is a measurement, so it is always a number: "a wheelbase of 2.7 metres", "a 106-inch wheelbase".

The wheelbase of a car, bus, truck, motorcycle or bicycle汽車、巴士、卡車、機車或腳踏車的wheelbase is the distance from the centre of the front wheel to the centre of the back wheel是前輪中心到後輪中心的距離 — more exactly, from the front axle to the back axle更精確地說，是前軸到後軸的距離。It is a measurement它是一個測量值, so it is always a number所以一定是個數字: "a wheelbase of 2.7 metres"軸距2.7公尺, "a 106-inch wheelbase"軸距106英吋。

This is a technical word from cars and engineering, not everyday talk. You will meet it in car reviews, sales brochures, and specification tables, next to length, width and height.

This is a technical word from cars and engineering這是汽車和工程領域的專業用語, not everyday talk不是日常對話會用的字。You will meet it in car reviews, sales brochures, and specification tables你會在車評、銷售手冊和規格表裡看到它, next to length, width and height就在長、寬、高旁邊。

People who love cars use it a lot, because wheelbase changes how a car feels: a long wheelbase gives more room inside for the back seats and a smoother, calmer ride, while a short wheelbase makes a car easier to turn in small spaces and, some drivers say, more fun. Car companies often sell a "long-wheelbase" version of a model — the same car, stretched, with extra leg room in the back; in that use the word comes before the noun with hyphens, and is often shortened to LWB (and SWB for short-wheelbase).

People who love cars use it a lot愛車的人很常用這個字, because wheelbase changes how a car feels因為軸距會影響開車的感覺: a long wheelbase gives more room inside for the back seats and a smoother, calmer ride長軸距讓後座空間更大、乘坐更平穩安定, while a short wheelbase makes a car easier to turn in small spaces而短軸距讓車子在小空間裡更好轉彎, and, some drivers say, more fun有些駕駛說也更好玩。Car companies often sell a "long-wheelbase" version of a model車廠常常會賣某款車的long-wheelbase（長軸）版本 — the same car, stretched, with extra leg room in the back是同一款車拉長車身，後座多了腿部空間; in that use the word comes before the noun with hyphens這種用法裡這個字會加連字號放在名詞前面, and is often shortened to LWB (and SWB for short-wheelbase)常縮寫成LWB（短軸則是SWB）。

Note that wheelbase is not the same as the length of the car: a car has some body sticking out in front of the front wheels and behind the back wheels, so the car is always longer than its wheelbase. The word for the distance between the LEFT and RIGHT wheels is different — that is the track (or tread).

Note that wheelbase is not the same as the length of the car要注意軸距跟車長不是同一回事: a car has some body sticking out in front of the front wheels and behind the back wheels車身在前輪前面和後輪後面都還會多出一截, so the car is always longer than its wheelbase所以車長一定比軸距長。The word for the distance between the LEFT and RIGHT wheels is different左右輪之間的距離用的是另一個字 — that is the track (or tread)那叫做track（輪距）。

Almost always a countable noun; nobody uses it as a verb.

Almost always a countable noun幾乎都是可數名詞; nobody uses it as a verb沒有人把它當動詞用。