Originally Posted by wilem
probably more like 1.5 to 2.5 but it is quite noticeable and normal keep in mind it looks like 5 because one goes in and the other come out. it is normal and a major cause of tire wear. mine only has about 2000 miles on it and the outer tread bars are really taking a beating. the more curves in the park the more the tires wear. such is the life of a tandem axle trailer
Unless you are driving in circles, you have abnormal wear with only 2000 miles. I suspect you have bent axles. I would guess if you found a good level patch of concrete and take a carpenter's square and hold it up close to the tires and measure very accurately to the top and bottom of the wheel, not the tire, you will find your problem. I suspect the top of the rim is at least 1/16" + closer to the square than the bottom.