Abstract: A wheel clamp for supporting a wheel aligning device in a plane generally parallel to the plane of the wheel is disclosed. The wheel clamp includes a frame and a lower bracket attached to one end of the frame, said lower bracket having a support shaft projecting therefrom for supporting the wheel aligning device. An upper bracket slides on the frame in order to adjust the wheel clamp for wheels of different diameter. A set of levels attached to the lower bracket indicates when the clamp, together with the wheel, lies at a first orientation and also when the clamp has been rotated through 90.degree. and 180.degree.. The wheel clamps will frequently be used in pairs with left-hand and right-hand clamps being provided. The levels on each clamp of the pair are oriented so that each wheel clamp may be rotated to a predetermined position so that the wheel aligning tools on each wheel clamp are at the same elevation.