Goodyear's Marathon tires are specifically for use with trailers (and nothing else). They are a basic model and have a low price point, with limited features. These include a ribbed tread pattern for accurate tracking but also longevity, reinforced sidewall rubber to help resist cracking, and a scuff guard that protects the sidewall itself. The central rib is solid and provides constant contact with the road, and there are twin steel belts for tread stability and durability. The Marathon is for all types of trailers and is supposed to last a long time.