Acetone will completely dissolve SOME mini wheels.

With offroad tires, after cooking supper, I'd switch off the oven and put them in the 350*f oven and leave for 30 or 40 minutes. Usually the tires would snap off, and if not sometimes dipping them in cold water would do the job.

CAUTION....tires and wheels will be HOT

CAUTION....the aroma may offend your significant other.