Go to your local hardware or Lowes or Home Depot and get a gallon of acetone and a resealable can like a bucket. I use a half gallon ice cream pail and just throw the wheels in there and let them soak. Take a rag and dip it in the acetone and wipe the glue right off. The leftover rubber should basically fall right off if they've been in the container long enough. Use can also use this method to reuse tires and wheels, but your foam will be junk. Be careful with Losi pink compound, the tires will shrink on you but every other tire I've done this to has come out good. Hope this helps, good luck.