When it comes to cars, trucks, and SUV's there is 1 universal thing they all have in common; they have wheels...... Unless you have the vehicle parked and never use it and even then sometimes the wheels and rims are going to get dirty. Just like your boots, since the wheels are what come in contact with the ground they are naturally going to pick up dirt, grime, road tar or anything else that is not clean. If there is one thing I have found is brake dust can really get baked on to rims you do not regularly clean it up. When it does come time to clean up your tires and rims you cannot find a better product then Auto Magic Wheel Magic.