SpeedDemon — a look closer (part 6)

Most streamliners use a push truck to get them moving. Question is how do you setup something on the back of the streamliner to allow side-to-side movement as the pusher is pushing hard? Most people use small wheels, tubes with rounded ends and more. This is a giant encapsulated bearing that does all that and is a lot smaller. One on each side of SpeedDemon. (note: part# is shown for those who want to order)