It's mostly a preventative measure. The rhinos are stronger and capable of handling extreme angles. Once we lift our machines, add power, and start adding larger tires, we are asking the stock axles to do things they weren't designed to do. With all that said, the stock axles have proven to be quite durable, with only a few reports of breakage (usually in 4 wheel lock). Maybe I would never break a stock one, but as I continue to modify my machine I don't want to have to wonder.....and I DONT want to find out 50 miles from my truck!!