Most trucks have all the same weight hanging back there and race for years without this happening. I think his question was how does a brand new truck fail like that? Bummer for the cops guys. They did a lot of work prepping for the race and they had some pretty capable drivers in that spec truck!A lot of weight hanging back there with 2 spare tires and a fuel cell.
Welds can look amazing from the surface but not have full penetration or fusion. That looks to be the case here. Are any test put into these high dollar chasis to make sure they are sound? UT,Xray,ect??