Dont the rims have there own specific values? there's gotta be SOME way to do this..
the only thing ive tried is this bug i found, when i used hybrid editor on a car, if i edited any of the rims before i edited the car, when i finished with it, the rim sets would change to the full range of standard rims (some standard cars cant use certain rims). but i could never replicate it so at this point i dont know. it just doesnt seem like one of those impossible things like Carbon hoods on standard cars...