Hi. I ran a 33" spare on my rear carrier for a while. I noticed that the body panels near the carrier mounts was starting to separate. It wasn't bad, but you could tell the difference between the mount side and the other side. I eventually changed the bumper to one that had a mount, so I removed the stock one. I think the biggest problem I had was the rattle the large tire caused with the stock mount. It's really quiet now.