Had a blowout today, looking for new tire recommendations.

The LeRoys wrote:
One of our TT tires blew going down the road at about 55mph today. We got the spare on and are continuing our trip home.

I checked the tread the other day and I still had a lot left all the way around and pressure was right, so I'm guessing it must have hit something.?.?.

So now I'm going to have to search for a new tire. I'm not sure if I should buy what I have or get something better. Currently we have Freestar Radial ST tires that are load range D, ST225/75/r15. We usually have about 4,000 - 5,000lbs per trailer axle, so 2,000 - 2,500 lbs per tire.

Just looking for recommendations to look at or avoid.