I scored a couple SSP's on Ebay lately, one had a badly worn wheel, the plastic had dried and was super brittle. I took the car (Laker Special) apart, only 3 screws. Took the wheel out stripped the rest of the plastic off the wheel and then wrapped it snugly a couple of times with Electrical tape. Now it works like a champ! Granted, we stayed indoors on the tile as I'm pretty sure the cement would eat the tape after a while. Anyway, my grandson is having a good time with it. Thinking plasti-dip would be an even better fix, but for now it's working fine and it displays very well.