An all-terrain vehicle (ATV), also known as a quad, quad bike, three-wheeler, or four-wheeler, is defined by the American National Standards Institute (ANSI) as a vehicle that travels on low-pressure tires, with a seat that is straddled by the operator, along with handlebars for steering control. As the name implies, it is designed to handle a wider variety of terrain than most other vehicles. Although it is a street-legal vehicle in some countries, it is not street legal within most states and provinces of Australia, the United States, Canada, or the United Kingdom. In the UK, a recent variant class of ATV is now road-legal, but there are few models available in this class.
By the current ANSI definition, ATVs are intended for use by a single operator, although some companies have developed ATVs intended for use by the operator and one passenger. These ATVs are referred to as tandem ATVs.
The rider sits on and operates these vehicles like a motorcycle, but the extra wheels give more stability at slower speeds. Although equipped with three (or typically, four) wheels, six-wheel models exist for specialized applications. Engine sizes of ATVs currently for sale in the United States, , range from 49 to 1,000 cc (3 to 61 cu in).
四輪摩托車,三輪或四輪車,全地形車(ATV),也被稱為一個四,由美國國家標準學會(ANSI)定義的車輛上行駛的低壓輪胎,與橫跨由操作員的座椅是,沿與車把的轉向控制。正如它的名字所暗示的,它是專門用來處理更廣泛的地形比大多數其他車輛。雖然這是一個街道法律的車輛在一些國家,它是法律在大多數國家和省,澳大利亞,美國,加拿大,英國的街道上。在英國,最近的變種類的亞視現在公路的法律,但在這個類有一些型號的。
當前的ANSI定義,全地形車的目的是使用一個單一的運營商,雖然一些公司已經開發出全地形車,用於由操作員和一名乘客使用。這些全地形車被稱為的串聯全地形車。
騎車人坐在操作這些車輛和摩托車一樣,但額外的車輪在較慢的速度提供更多的穩定性。雖然配備有三個(或通常情況下,4)輪轂,六輪模型存在專門的應用程序。發動機尺寸的全地形車目前在美國銷售,範圍從49到1000毫升(3至61立方米)。