I have a 10 year old KZ Frontier 28 foot travel trailer that I've had for 7 years now and in the last few years have had a blowout (or 2) on my annual long distance 800 mile trip to Florida from Texas...
I like you used to have blow outs every time we went camping. I got a large tire all the way around. went from 14's to 15's and a big tread print. no more blow outs. cost me over $1000 but worth it.