Patent ID: 8307561

Claim:
A jig for measuring a runout of a flange surface of a hub unit used by being mounted to a road wheel mounting flange of a deformed type comprising a plurality of plate-shaped projecting portions which are formed on an outer circumferential surface of a rotating side member of a road wheel hub unit so as to project radially therefrom and each of which has a bolt insertion hole in a distal end portion thereof, said hub unit flange runout measuring jig comprising: an annular portion comprising an annulus with a diameter which is the same as an outside diameter defined by the plurality of plate-shaped projecting portions; and a plurality of protruding portions which protrude radially inwards from the annular portion to be fitted between the projecting portions when mounted to the road wheel mounting flange of the deformed type such that the protruding portions are positioned adjacent to a flange surface of the projecting portions so as to form an annular continuous surface.