Abstract: A tool tray for detachably mounting to the top of a vehicle tire having a rectangular bottom panel with opposing lateral sides and opposing front and rear sides extending upward from the bottom panel. A pair of resilient straps are mounted to the tray and extend downward from the lateral opposing sides of the bottom panel and bowing outward for detachably engaging the lateral outward bowed sides of the tire tray in complementary relation. A pair of adjustable plates are mounted to the front and rear of the tray and are adjustable downward below the bottom panel for engagement with the longitudinal circumference tread of the tire to accommodate the longitudinal curvature of the tire to prevent the tray from tilting to the front or to the rear on the tire.