I have two sets of Continental ContriTrac in 275/70R18 10ply. One set has 20,000 miles with excellent tread and have been rotated every 5,000 miles. $500 These are still on my truck until Monday 10/22/12 when my new tires come in. The other set has about 40,000 miles with good tread left and they were also rotated every 5,000 miles, $400. Both sets came off Ford F250's. They are in Pine Bluff. I can text or email pic's if interested.