I have the Boyd altamonts and have to commend the durability. I weigh 235# and ride on rough roads regularly. I avoid pot holes whenever possible and ride light over giant lips in the road, but do hop on and off of curbs at times and have hit a few holes that'll ring your ears (and pinch flat both tires). I even had them on my bike sitting sideways in the back seat of this when I got T-boned by a Lexus:





Ive had them for two years and have never turned a nipple on either of them. Had em in the truing stand to check a couple weeks ago and they are still within .003" overall runout.