So the '15 "Heavy Duty" bars look the exact same as the ones on my '14 that like to bend. I measured the diameter at all areas and they are the same. The actual thickness of metal used look the same if you look into the drilled hole in the middle. Looks like the same metal used too, but hard to know that for sure. From my take, these will bend just like my 2 sets of '14 bars did. And I never wrecked. They just bend from normal use and rollovers in pow. I'm not that heavy either. Cat sure made it look like these bars were new and HD in the accessory catalog...