I agree with Bob, Carlisle tires are junk. I had a blow out with my 22' trailer a few years ago on the New Jersey turnpike going the speed limit. By the grace of God and some limited driving skills I got it under control and pulled over. Carlisle would not do a thing for me until I had my lawyer send them a letter. The dealer then gave me four new General tires. I asked why not carlisles and he said off the record they were having problems with them. No problems since. Dave Birchmire,Sr.