Out of all the trailers I have built I have yet to build a single axle trailer with much articulation as there is no opposing axle or force. These are also not your normal week fenders. this are big rig fenders and much thicker than the average trailer fender. the held on with 3 welds on each side and I, weight 300 pounds can jump in them without bending one. The 5/16" angle in the front and rear will also help keep them clean. If someone bangs these up i bet they have there issues. We put over 1000 pounds on the trailer when we adjusted the fenders. Also the axle is suing under and a straight axle so it can be flipped easily allowing for Way more room if the new owner wishes.