Abstract: An upright vertically extendable frame is provided including upper and lower portions. The lower portion includes widely spaced opposite end portions and the upper portion includes a central uppermost portion. The opposite end portions include depending feet adapted to rest upon spaced marginal portions of the flooring of a pickup truck load bed and the central uppermost portion includes an upwardly projecting abutment adapted to be engaged under the upper inwardly projecting ledge of the side wall of the associated pickup truck load bed. Finally, the vertical mid-portion of the frame includes clamp structure for clamping a vehicle wheel and tire assembly against one side of the frame.