1998 Ford Windstar Owner Guide 1st Printing - Page 295

Replacing the Tires Replace tires that show wear bands. When your tire shows a wear band, it has only 1/16 of an inch (1.59 mm) of tread left. A worn-out tire Because your vehicle's tires may wear unevenly, you may need to replace them before a wear band appears across the entire tread. RWARNING When replacing full size tires, never mix radial, bias-belted, or bias-type tires. Use only the tire sizes that are listed on the tire pressure decal. Make sure that all tires are the same size, speed rating, and load-carrying capacity. Use only the tire combinations recommended on the decal. If you do not follow these precautions, your vehicle may not drive properly and safely. RWARNING Make sure that all replacement tires are of the same size, type, load-carrying capacity, and tread design (e.g. "All Terrain", etc.), as originally offered by Ford. 296