What the biggest tire you can put on a ford explorer sport track?

The largest tire size you can typically fit on a Ford Explorer Sport Trac without modifications is around 31 inches in diameter, depending on the specific model year and trim. However, for optimal performance and to avoid rubbing, it’s often recommended to stick with a 30-inch tire. If you plan to lift the vehicle or make other modifications, you might be able to fit larger tires, but it's important to consult with a tire specialist for the best fit.