The shock hangers on my 5er(2009 Forest River Silverback) moved and my Michelin ribs were damaged. Work was done before Forest River was notified and therefore they didn't cover the replacement tires or the cost of the work done even tho' my dealer backed me up on the problem. The new hangers did the same thing only they didn't cause the damage that the old ones did becuase the problem was spotted quickly enough. After talking to Forest River, I was told to take the shocks off and have the hangers removed, which I did, because the shocks shouldn't be on there with the suspension system that is on the trailer.It's the E-Z flex system. They have been off for a few years now and I haven't noticed any difference in the ride of the 5er. I do have the trailair king pin box.If your rig is still under warranty I would be giving the manufacturer a call before any work is done or your warranty could be voided.