I have used different brands of tires over the years but have found the Goodyear G159's to be a great and very strong tire with highway tread. They are commercial truck tires and can be re-cruved if you are into that kind of economy move. I don't let my tires go past 7 years regardless. We are in the northwest and the coach is in a barn. If my GMC was kept outside and in the southwest or south I would not go beyond 5 years.