Recently, we added the Power King Towmax STR to our trailer tire line-up that also includes the Goodyear Marathon Radial. By adding the Towmax STR tire, we now have more sizes and load ratings available for customers looking for Trailer Service tires.
Both tires are similar in their exterior features. A rounded shoulder with an internal polyester cord body provides a smooth and stable ride. Circumferential grooves provide ample water evacuation. Constant and consistent contact with the road is achieved through the solid center rib and symmetric tread design.
Goodyear Marathon Radial
Power King Towmax STR
Both the Goodyear Marathon Radial and Power King Towmax STR are radial construction. We don't offer bias ply lines. Additionally, Tire Rack only offers modern tire sizing in the form "ST205/75R15." If you have an older tire with a classic size such as 6.50-15, you'll need to convert to a modern size first. To make the conversion simple, take a look at this table.
Special purpose trailer tires aren't intended to be used on cars or light trucks and are not UTQG rated. Your trailer will be more stable and pull better on tires designed specifically for trailer use. Since Special Trailer tires are constructed with heavier duty materials, they are tougher than typical passenger vehicle tires. This is a plus because trailer suspension systems are generally stiffer and less sophisticated than automotive suspension systems. For more information on a trailer tire's design, read "Trailer Tires vs. Passenger Vehicle Tires."