I think it has to do with failure rate but I don't know of any compiled chart comparing that of all the brands; mostly word of mouth on forum like this one. My first two trailers both came with Duros and I never had a problem with them and got 6 years out of them. Having said that, I just replaced my 6 year old Duros with Maxxis tires. Since you'll be mounting new tires, put on metal valve stems if you are (or might be) mounting external TMPS sensors. I had mine originally mounted to the rubber ones and they would flex and hit the rim (rub marks were found). When I had the new tires mounted I went to the short metal stems.
