When I replaced my "2014" blowmax tires I told the tire store I wanted them balanced. He said he had never balanced a trailer tire before, but if I wanted it done, he would do it. He had to glue weights on the rim because one of the wheels needed so much weight. I thought ALL tires needed to be balanced to improve tire wear.
I urge everyone to get their trailer tires balanced.
They do not come balanced from the Heartland factory, and when I had mine done a couple of months ago, they discovered that one of the wheels that came on my 2013 Trail Runner was bent and/or warped!
It is now my spare, but I think I need to see if it can be replaced under warranty since it came from the factory this way!
By the by . . . not a single one of them was balanced, including the bent/warped one!