Is there a warranty concern if you replace non all-terrain tires on an Explorer? Many people have posted getting Michelin LTX M/S not A/T's. I replaced my Firesones with the BF Goodrich Radial Long Trail T/A's. after reading the Consumer Reports review of tires. They used the Michelin's and BF Goodrich on SUV's with excellent results. I did save the Firestones and will return them with my Explorer at the end of my lease in a year and a half.