Steel belted 225/75/15 load range E tires are what I run now. After 30 years of flats on hunting trips. A few extra $ on Trailer tires is worth it. I tend to pull my trailer in tough country some years. 20 miles of washboard go's by much faster at 50mph. Hard on trailers and tires. My trailer is a bare bones hunting trailer. Ripped the black tank out on a chukar trip. So I finished the job and just set up a crapper with tent. It has never spent a night in a campground. Water is a few 5gal jugs inside the heated area. Old bathroom is where I store stuff like Blinds, tree stands, Decoys, Chairs, Table for outside. Half the windows are covered inside with 1" insulation foam boards and silver duct tape. Staying warm at -20 is more important than looking out fogged up windows. About every 10-15 years I find another old trailer to replace the wash board road killed ones.