The tires on my boat trailer seem to be wearing "funny" - the boat is just over a year old and I've got somewhere around 3000 miles on the trailer tires. I've never rotated the tires. Tire pressure is around 45 lbs. The photo shows the passenger side tire, looking toward the back of the boat so the "outside" of the tire is on the left. The tire on the other side looks pretty much the same, with the wear pattern on the opposite side. As you can see in the photo, the outside 2 treads are almost gone, the 3 in the middle are barely worn at all and the 2 treads on the inside are worn but not as bad as the outside. Any clues as to why the tires are wearing so badly? The obvious answer might be an alignment problem with the trailer - if that's the case, how do I get it fixed? Thanks!