Oh, OK, all is good then. I misunderstood thinking that it was bike's frame that got bent. My expectation too is of the bikes' frames being fine but I did not want to argue in this case misunderstood facts. In the role of extra protection I will presumably add a strap holding the bike immobile against the reinforced bottom. but will attach the ends of the strap to somewhat reinforced sides of the bag and run the strap over the top of the bike, differently from the inconvenient arrangement in the B bag.