2003 Mercury Mountaineer Owner Guide 1st Printing (Spanish) - Page 528

Maintenance and Specifications Replacing tires Replace the tires when the wear band is visible. Due to exposure to the elements and exhaust you should replace the spare tire when you replace the other tires. Never mix radial bias-belted tires, or bias-type tires. Use only the tire sizes that are listed on the Certification Label. Make sure that all tires are the same size, speed rating, and load carrying capacity. Use only the tire combinations recommended on the label. If you do not follow these precautions, your vehicle handling may be effected which can lead to loss of vehicle control, vehicle rollover and/or personal injury. Make sure that all replacement tires are of the same size, type, load-carrying capacity and tread design as originally offered by Ford. Do not replace your tires with "high performance" tires or larger size tires. Failure to follow these precautions, your vehicle handling may be adversely effected which can lead to loss of vehicle control, vehicle rollover and/or personal injury. Tires that are larger or smaller than your vehicle's original tires may affect the accuracy of your speedometer. 241