It's possible to give each car different internal wheels, but external ones is questionable.
I'm also doubting that it only has 2 faces... im guessing 4, as the rev lights use a different part of the texture. Also, there would be another 2 faces for the back.
Maybe once stifflers mum has finished all his wheels he'll give me permission to mod them for different internal wheels per team? Also, are the LCD text positions all the same for each wheel?... this is the only thing that must remain the same for each team.