We are currently looking at several used 2 horse BP trailers.  I have read in previous threads that it is possible to twist or permanently bend an aluminum frame.  Is this really possible?  What features of the trailer would you examine to evaluate the integrity of the frame and axels?

Thank for your comments!

Do your home work, buy a well recognized name brand trailer because any company worth their salt will take care of the problem.....but in reality you shouldn't have a problem. Trailer companies know the metal properties they're working with and engineer their trailer to withstand the normal traveling stresses that they'll be exposed to. Look at the welds, the frame, the thickness of the aluminum used and the width and placement of the cross members. You'll find that companies like Stidem, SilverLite, Merhow, Bloomer and 4 Star use a larger frame, closer cross members and boast fine welding. There are many good builders out there who are in the business for the long haul. As with any product you'll find trailers built for quantity sales more than quality. These trailers will have spoty welds, lower grade and amount of aluminum used as well as lessor standards by which they produce their products. Our advice on a pre-owned trailer is to crawl underneath and check those welds and sub structure. Check the rear and side doors for fit, they may not be solid tight but they shouldn't be crooked. Pull the trailer and have someone follow to check for tracking. This is when one end of the trailer is not in line with the other....a sure sign of trouble. Lastly, check the  tires for uneven wear could be a symptom.

Good luck buying your trailer and I hope I helped and didn't bore you!