We were coming back from Colorado last week in our toyhauler (weighed around 6,500 lbs) when the right front trailer tire blew so I slapped the spare on and away we went. 10 miles later, the left rear tire blew, luckily I was able to limp it off I-25 to a service station and get 3 new tires (replaced the spare as well). 100 miles later the left front tire blew. The trailer is a Work and Play toyhauler and is only 3 months old and the tires are Carlisle tires 205/75/15 load range C. The 1250 mile trip up to Colorado was uneventful except for the blow out of my right front truck tire at the top of Monarch Pass when I hit a rock from a rock slide in the road, but that's another story. The trailer was loaded the same configuration and we had no problems. I checked all the pressures in the tires (50 psi) and cannot for the life of me think of a good reason to have 3 blowouts in less than 125 miles. I was driving 65 mph so I wasn't driving fast. I wonder what the reputation of Carlisle tires are. I didn't keep any of the blowouts as I didn't think it would keep happening and once it did, I was so ****** I didn't care. Oh yeah, I also had a flat on my mountain bike and my wife got 2 flats on her dirt bike during this trip, worst tire luck I have ever had...