His tires can't be rotated as wheels are different sizes and bigger ones in the front and smaller rears will cause the car to handle weird, DSC/TCS to go whack too and cause mayhem. The split on these are anywhere from 45/55 or 40/60 causing the rears to always wear faster as they're RWD based cars, just like a FWD based AWD will wear the fronts faster than the rears.