The PRO 920 PLUS TC Tire Changer features a larger and thicker turntable dismounting 10-22" rim and max, tire diameter 39"; an "s" linkage design, which moves turntable clamps and ensures firm, even grip on wheels; powerful under turntable cylinders that hold clamps firm; a taller vertical post, dismounting max, tire width 12"; a 40 amp rated silver contact universal reversing switch, a hexangular shaft made of hardened steel, preventing distortion when operating larger or low profile stiff tires, high quality steel foot pedal assembly; Rim clamps cast of fine alloy steel, and each of the 4 rim clamps have 2 air jets for maximum bead blasting efficiency.