Well I think the mystery is solved. I finally reached the previous owner. He said he had a flat on that tire some months back and evidently it was put on wrong as you all suggested. He said he never noticed, and never would have noticed the tread was reversed. I told him that I didn't notice either but the eagle eyes at tractorbynet spotted it immediately. Thanks for pointing it out folks. Nice work! I'll be getting it fixed tomorrow. I think I'll stick with the normal forward direction as I do more bush hogging that FEL work. Thanks again guys!