Abstract: A tire stacking apparatus includes a base frame with a carriage pivotally mounted on the frame for selective movement between a horizontal loading position and a vertical stacking position. The carriage includes a pair of parallel support members connected to a rotatable axle, and a pair of legs connected to the axle generally perpendicularly to the support members, the leg members and support members connected for rotation on the axle to pivot between the loading and stacking positions. The support members and leg members are spaced apart a distance to support tires therebetween such that a row of vertically oriented tires resting on the support members will be formed in a vertical stack on the carriage leg members when the carriage is pivoted to the stacking position. A cylinder with an extensible plunger rod is operably connected between the base frame and a lever arm connected to the axle to selectively pivot the carriage between the loading and stacking position.