You may also use LT tires on your trailer as long as it has the proper load capacity. In fact many folks that have the usual ST tire problems, move on up to the LT tire.
Benefits are 7-10 years before replacement vs 3-5 years for the ST tire.
LT tires have no speed restrictions vs 65 mph for the ST if your a interstate traveler.
If you choose to use a ST tire be aware of warranty differences. Maxxis ST8008 has a 5 year warranty and other ST brands may have a 3 year warranty. Some don't bother with it....some do.
Depending on room in the wheel well and proper wheel pressure/wheel width requirements;
... the Goodyear Wrangler HT in a LT235/75-15 C (50 psi) at 1980 lb capacity. Most LT tire makers carry this size.
And a Wrangler HT in a LT215/75-15 D (65 psi) at 2090 lbs capacity.
Maxxis LT U-168 are a commercial grade tire with several 15" sizes and have became popular with all types of trailer owners.
I see the Yokohama RY215 in a 700R 15 D at 2040 lbs capacity is popular on some of the other RV websites.
Do your home work on the numbers for your particular trailers wheel well top and side clearances.