ok so if i change the 265 for something smaller will that be ok. and i just read about roling diameter being different from front to rear am i going to have a prob with this? and i just found out the rears are 18x9.5 + 38 offset running 265/35/18 and the fronts are 18x8.5 + 34 offset running 235/40/18. is this going to cause probs?