The COATS® Model 4070 Center Post Tire Changer is the latest in a long line of fast and durable center post tire changers from Coats®. It's predecessor, the Coats® 4050, set the industry standard for high-volume tire changing. All operations--bead loosening, demounting, mounting, and inflation are performed in the same position. The contoured tabletop provides proper rim support, and a 7.5 gallon surge tank is 50 percent larger than competitive models for the inflation power when you need it. But, unlike it's predecessor, the new Coats® DDP Center Post has grown to accommodate more of todays wheels. The large diameters and tougher wheels are no match for the increased capacity and bi-directional power you will find in the new 4070 model.