These ST205/75R15 tires have the GM R781 tread pattern that is designed for improved handling, ride, and heat dispersion.
This tire is DOT approved for highway speeds and use on US Highways.
This 6-ply tire has a load rating of 1820 lbs. when fully inflated to its max PSI of 50. It is recommended to run trailer tires at their max PSI as that is what they are tested at for ratings and running them lower could cause tread wear issues or even a possible blow out.