So when I purchased my truck at the dealership they did a once over to make sure everything was good before I took it home. The service person who took it to the back to have it looked at weighed a good, I dunno, 350-400 pounds. The man was physically huge, taller, around 6ft, and obese. I could see flex in the running boards when he "boarded" my truck. I was immediately impressed with how well they hung in there. They still look straight and seem perfect despite this stress test.I hear you. They support my 300lbs better than the OE chrome & plastic ones on my old Denali HD.