Tire question ?

[E-fanatic]

I picked up some losi super bolt-on tires and the foams that came with them are smashed on 1/2 of it(from packaging). So even letting them sit for a few days the foam didnt swell back up. I tried to install them but had huge flat spots in the tire b/c of it. So I was wondering what foam will work in these tires? They are 40 series , inside diameter is 3.7in (where the tire meets the rim) outside diameter is 6 inches (without tread) 6.4 inch with the tread

Any help would be greatly appreciated!