I understand your veiw point. My point is that wider tires "float" on ice, snow, and rain much quicker. The larger the footprint, the lower the ground pressure. If you drive a vehicle "hard" you will wear any tire out quickly, regardless of size or width. On dry ground, narrower tire will not hold as well as the factory tires; but, with proper and safe driving, narrow tires will last almost as long and will provide better fuel economy at the same time. Because I have lived in the south or overseas for the past 20 years I have not had the chance to explore what dimensions would be best for a Explorer; but, if I were to guess, a reduction of 10 to 20 mm in width should provide a reasonable tradeoff. On a Mustang Ford used P225 tires where P185 tires should be for other than dry. On that vehicle you can run a P215 tire with minimal tradeoff and gain a mile to the gallon. Tire manufacturers are making "funky" tread patterns to try to offset the wrong width tires. Try driving a economy car (rent one) with narrower tires and you will notice that they run and handle acceptably. If you "sport" (drive recklessly) drive them on dry pavement then the tire wear increases.