If you replace the tires, charges will be assessed for each tire that is not of equal size, quality, and speed rating as your original tires. (You can find the speed rating label on the inside of the vehicle’s door jam.) Also, acceptable wear is a minimum of 4/32 of an inch of depth from the finish tread. Your Ding-O-Meter can help you to identify whether or not your tire falls within our guidelines. Your BMW Center will be able to provide you with a final, more precise measurement using a tire tread depth gauge. Tires with cuts or gouges will result in additional lease end charges. Please note: If your vehicle originally came equipped with run-flat tires, then your vehicle must be returned with run-flat tires. Otherwise you will be charged for new tires.