We took our first long distance PUP trip last week to spend Labor Day weekend at Letchworth State Park outside of Geneseo, NY. It was a two fold trip, my wife's family was having a family reunion Saturday September 5th and we were going to camp while visiting. It was about a 1200 mile trip each way. We thought we were ready. We'd done a short trip before. We had checked wheel bearings and the tires on our 2008 Flagstaff 228D looked brand new hardly any wear on them. Oh how I wished I knew as much then about trailer tires as I do now.... We left Seminole on Wedesday night. We made it as far as Ocala before we had our first blowout around midnight. The tire literally exploded. We were on the rim by the time I could get over to the right DOT lane. We had a spare and changed it. We laughed and thought this was our one problem for the trip. We stopped at Walmart and picked up a new spare. Thank God Walmart is open 24 hours! Even better they sell trailer tires on the rim and ready to go. Our 175/80R13 tires were $95. By the time we made the outskirts of Jacksonville the PUP was bouncing up and down causing one hell of a bumping in our vehicle. We stopped and found the spare we had put on to replace the blown tire was out of round. It had a hernia! We put the Walmart replacement spare on and removed the herniated tire. We needed another Walmart and found one ASAP. We knew the tires that came with our used PUP had gone bad. We made it into South Carolina before the last of the original tires blew out. Another Walmart later and we had 3 new trailer tires. Let all PUP owners learn from our painful experience.... Trailer tires (bias ply trailer tires) are good for 3-5 years MAX! They may look perfect but on the inside they are falling apart after 3-5 years. Oxidation and UV light break the tires down. They ply's (plies?) separate and the tire tears apart at speed. Also, those tires are only good for 65mph MAX! Our tires were probably original to the trailer so they were probably manufactured in 2007. Always check those production date codes on the tires when you buy a used PUP. The rest of our trip went fine. No other issues. I think we'll stick with these tires for 3 years and then we're changing to radial trailer tires.