Tire status display system for a cargo trailer

The invention discloses a trailer (48) having a cargo containment body supported by a plurality of wheel units, each wheel unit having a mounted tire (52); and a tire status display unit (70) externally mounted to the trailer (48) and operative to communicate a visible trailer tire inflation pressure status indicia, the display unit (70) mounted to a forward end of the trailer at a mounting location operatively visible to an operator of a tractor (50) during coupled operation of the tractor (50) and the trailer (50).