Then what you say about ff alloy rim cars, wide and big tyre are not good for suspension, like 155/70/13 is ff size then if you use 155/65/13 its ok but if you use 155/75/13 its not, same if you use 165/70/13 its also not good..... if you put 14R rim , wide or large in height tyre etc it must make a difference little or more