The numbers on a tire:
Sidewall height, ratio of height to footprint width, rim size.
155 80 13 ... 155 mm high sidewall, sidewall is 80% as tall as the tire is wide, 13 inch rim. (the R = radial)
175 80 13 ... 175 mm high sidewall.... the rest being the same, it fits the same rim, but is taller and wider so may have clearance issues as the springs flex allowing the tire and axle to move.
You really want truck tires on a truck, car tires on a car and trailer tires on a trailer. They act differently and are built differently. This is especially important in their load ratings and how the tire sidewall affects the trailer handling on the road.
You can get away with a lot more if you are hauling a light aluminum boat than if you are hauling a heavy fiberglass boat of the same length.