We did buy the extended warranty when we got our 5t wheel. A little over a year after delivery, saw an extreme wear pattern on one rear tire. Took it to the selling dealer to have it checked out. They said I had bent the rear axle by hitting something. I asked which direction and they said it was bent toward the rear. My next remark was that if I had backed into something, it would have been bent forward and I I had hit something going forward, it would have been the front axle that was bent, not the rear. Warranty company replaced the axle.