Abstract: A vehicle seat assembly is attached to a vehicle support structure by a mounting assembly. The mounting assembly includes a first track and a second track supported for movement relative to the first track. This allows the seat assembly to be adjusted forwardly or rearwardly by a seat occupant. The seat assembly preferably includes a seat belt assembly that is supported solely by the seat assembly. Thus, all forces that are exerted on the seat assembly are transferred to the mounting assembly. An aluminum track assembly is provided to reduce weight and overall cost of the mounting assembly. The first track has a first pair of sidewalls interconnected by a first base portion and the second track has a second pair of sidewalls interconnected by a second base portion. The first pair of sidewalls each have a first arcuate bearing surface and the second pair of sidewalls each have a second arcuate bearing surface opposite from the first arcuate bearing surface.