This is very interesting and informative.
http://www.rv.net/forum/index.cfm/fu...d/19845815.cfm
Also, while washing our Sunline after returning home last weekend I noticed something. None of the wheels had balance weights. That means that none of them were balanced. From riding in the TV, you would not know if you have one beating the bearings and tire to death due to not being balanced. I will have them all balanced before our next trip. No tire and wheel combination is that good, especially chinese ones.