So, in the little over a year since we upgraded our TV from the Pathfinder to the Sequoia, we've had three flats on the trailer, whereas previously we'd gone a couple of years without any flats. Since at least one of the flats was one of the replacement tires, I can't make the correlation between tire age and failure. I'm wondering if the reason is that the Sequoia is a wider vehicle than the Pathfinder, putting the wheels on the TV more in line with the wheels on the P'up. My suspicion at this point is that the tires on the TV are kicking up road debris such as a nail or screw, which ends up striking the P'up tire just right to poke in and cause the flat. The last two flats, the tire shredded before I realized it was flat, so any evidence of the culprit was long gone. Has anyone else had issues such as this? I'm considering putting together some kind of flaps to go in front of the P'up tires to deflect road debris away from them.