Confirm Tire SizeShopping for tires? Select tire size to proceed.
2005 BMW 530i Base
BMW equips your vehicle with more than one possible size during production.
Please select the size installed on your vehicle from the choices below.
Original Equipment Wheel Diameter: 17"
225/50R17Original Equipment Wheel Diameter: 18"
245/40R18![The tire size is set by the numbers on the tire. The numbers are width, ratio and diameter in order]()
Where can I find my tire size? 
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Where can I find my tire size?