Victory- What type of backing is on the back side of the carpet that covers the spare tire? Is it the same that is used to cover the back seat area? Someone said they used cardboard in another post, but I would think that would be kind of flimsy. Yours looks a little more substantial. Thanks.
It's a molded hard thin fiberboard piece that came with the kit (it's the top piece in post 3). It's very much like 3/16th thick "Upson" board. Flexible, but much stronger and holds it's shape better than than cardboard.
Check these links:
Niagara Fiberboard Upsonite Products
4' x 8' x 3-16 Upson Board