As per AKC regulations, the tire or circle jump, consists of a circular object that resembles a tire, e.g. a piece of flexible drain pipe in the form of a circle. The circular object is 3 to 8 inches thick and the interior diameter is 24 inches, plus or minus an inch. There must be at least 8 inches between the circular object and the frame which holds the object, i.e. the tire. The frame will suspend the tire so that the tire opening low point will be at all of the defined jump heights.

The frame is made from 1 ½ PVC sched 40 pipe [actual outside diameter is 1 7/8 inches]. The 90° elbows are glued on to the top bar. The 2 bottom sections consist of 2 24 inch pieces of pipe glued into 2 Ts. The whole assembly, including tire, consists of 7 pieces. The tire jump is easily assembled and dis-assembled in a few minutes. All bungee cords, chain, and hooks stay with the tire.

The tire is made from flexible drain pipe and shaped into a circle. Three (3) eye bolts are attached to the tire - at 9 o'clock, 12 o'clock, and 3 o'clock positions - which are used to suspend the tire from the frame. The drain pipe is wrapped in red or white or blue tape to give it that pretty look and to help hold it together.
 

To properly suspend the tire and prevent it from swinging in a slight breeze, shock or bungee cord is attached to the vertical posts and runs through eye bolts on either side of the tire. This picture shows how simply the cord attaches to the supports. The bungee cord ends are wrapped with red duct tape to prevent them from fraying.



The tire heights are obtained by hooking the chain to one of the eye screws that are screwed into the top bar. The 4 inch height is obtained by hanging the tire from the center eye bolt. A piece of PVC is glued to the top bar to give the eye screw more to grip.