My Forest River Rockwood 5th wheel came with Trailer Express Tires. After about 3k miles they were losing a little air every month or two. I didnt think much about it but then had two blow outs inside of a month. One had a side bubble and the other lost some of its tread. I replaced the other two today. You would think with a $50k trailer they would put a decent tire on them. The reviews on Trailer Express tires are terrible.