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A hubometer (''hub'', center of a wheel + ''-ometer'', measure of), or hubodometer or simply hubo, is a device mounted on the axle of an automobile or other land vehicle that measures distance traveled. The whole device rotates with the wheel except for an eccentrically mounted weight on an internal shaft. This remains pointing downwards and drives the counting mechanism as the body of the hubometer rotates round it. == Typical uses == They are needed on semi-trailers where they are the only means of measuring distance traveled over the lifetime of a tire or the trailer. They are used on bus or truck or trailer wheels where the tires are supplied to the vehicle operator by an independent company on a contract of "price per thousand kilometers". The hubometer is installed by the tire company to give them their own measure. In New Zealand hubodometers are used for the calculation of road user charges 〔Road user charges handbook, ISSN 1176-9297〕 for HGVs powered by a fuel not taxed at source. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hubometer」の詳細全文を読む スポンサード リンク
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