A hubometer (from hub, center of a wheel; -ometer, measure of) or hubodometer, is a device mounted on the axle of any land vehicle to measure the distance...

A Hubodometer on a wheel of a semitrailer...

tax in stages between 28 February 1978 and 1 January 1979, requiring hubodometers to be fitted to all vehicles over 3.5 tonnes. Sales tax on heavy vehicles...

for use in the commercial trucking industry, such as hub oil seals, hubodometers and other products which have become standard additions to OEM truck...