Not sure about your exact model, but none of the bumpers I have seen are strong at all. They pretty much are good for protecting the rear of the trailer from light bumps, and for storing the sewer hose. Unless you can verify that it is made of 11 gauge steel or thicker, I would not trust it to hold more than the spare tire, and even that would be pushing it for most of the RV bumpers I have had or seen. Up to you, but that's JMHO.
2003 Ford F-350 V-10 Crew Cab 4WD Long Bed
2004 Jayco Designer Medallion 29 RLTS 5th wheel
Bill, Gayle, and Mindi (dachshund)
Retired at last !
Nothing is foolproof to a sufficiently talented fool.