We added a 4" bumper adapter receiver for hauling 4 bikes. After a years or so, we noticed that the bumper was deforming; this is after a CW service tech told us the bumper was strong enough. Top ...
I have seen these bumpers twist when adding buck racks to them. They are really not that strong, and the weight of 4 bikes and the bouncing is too much for them to handle. I installed a front mounted hitch on my tv and mount the bike rack to that. Cost was about 200 and about 45 minutes total installation time.