I brought some pvc pipes home with my Tesla. Some smaller diameter 20-foot pieces
went from the passenger footwell diagonally out the back, but was too flexible, and was
wanting to drag on the ground. However, cutting a few feet off made it work Ok.
Had I needed the full length, I could have bought one larger diameter piece
to use as a stiffener, and tied the little to the big.
You can get 4 full size tires on wheels in the Model S, in two stacks of two.