I just about had a disaster with my 2015 Jayco White Hawk 27. A gas station attendant spotted one of my trailer tires was wearing on the edge and was about to fail. While changing the tires they found all the suspension bushings were wore out and the bolt holes were elongated. This caused the tires to wear. We found that the bushing were plastic!!! Not a good use for plastic for sure. We had just had the wheel bearings repacked and had about 2500 miles on them. The tech. did not notice a problem. Well lucky us as we had all the pins and bushing replaced with bronze and wet bolts. Of course the original tires had to go. It totally blew me away that Jayco would put such inferior product on their trailers and not offer upgrades.
Lesson learned, Jimbob