They are a type of customized motorbikes with an extra fuel tank capacity and a big engine (1500 - 1800 cc or higher). They are built to travel far away, across the american's roads and higways in a high cruise speed.
巡洋艦
american、car、live、mechanical、motorbike、style
美國、汽車、生活、機械、摩托車、樣式
資料來源：openclipart ( https://openclipart.org/ )