If you don't have a way to roll with heat, try rerolling them with 60cc and wipe them with a few coats also. But I would be trying to find a way to get some heat to the tires while you roll, have seen guys use a space heater or even the square 500w work lights and sit them a couple feet from the tires, those work lights put off a good bit of heat, but a couple of small space heaters would work also. Doesn't have to be hot, just get some heat into them, around 100*