as you know off road tires are designed to have flexibility and absorb for performance and handling i would rather drive it to the speed there rated at and have fun with the vehicle but if you want more speed without ballooning it's probably best to find a custom wheel/tire combo to suit.
foam contact glue shouldn't melt the foam but the inside of the tire would have to be scuffed for it to adhere it may not bond to the rubber as well.
also with the wheel being plastic it would have to be scuffed for it to adhere i'm only guessing it may not work or make any difference if it was...
what about taking a pair of wheels and tires and gluing the surface width of the foam to the inner tire then glue the inner foam to the wheel surely that might decrease ballooning just a bit. obviously once that is done the tire can't be removed without making a mess of it.
take the tire off and glue anchor's points to the inside of the tire then zip tie through the foam and connect it to the wheel.
it's a dumb idea i'll probably try it one day :hehe: