If you bump into your tire guy again, ask him what would cause a set of Carslisles like yours to dish the leading edges of the treads on either side of the tire.
My tires don't have 1500 miles on them yet and the tread looks like mud tires, inside and out on both tires.
I did figure out over the weekend that what I have thought was a bent rim, hub or loose spindle nut is actually my tires flat spotting and bulging every time that the boat (or even the trailer by itself) is parked. I've been watching what looked like a wobble in the side mirrors for over a year now and tightened the spindle nuts a bit last year with no change. I jacked the trailer up on Saturday and spun the wheel while looking at the rim and it wasn't wobbling. That's when I went to the front side and spun it as the brick that I chock my tire with was behind it for reference. You could definitley see what looked like a tire wobble. While spinning it slowly and watching a reference point on the brick, there was an 8" or so area that was obviously 1/4" out from the rest of the tire. Upon closer inspection, that 8" area was where the tire was contacting the ground while it was parked, causing a bulge.
That would make my tires extremely out of balance every time I hook to it until they spin and heat up enough to get back into round. I have a suspicion that it is also what is causing my tread wear issue.
There's no way to balance that out of the tires. Every time the boat or trailer is parked, it will change the point where the tire is out of balance.
I'm really not liking these Carlisle tires. I have run them for years and never had an issue but this set is really leaving a lot to be desired.