Newracer- the clamping hub is my favorite now. It may not be as totaly true in motion as the Assoc. screw on but it is easier and more consistent to set side play and I think stronger. The Assoc. screw on hubs can go out of round and I have seen it happen to others as well has myself. They are also very difficult to set the side play and can back off so I normally had to sand it down and do final adjustments with very thin washers, over time the hub would wear down a little more and I would have to readjust with washers. The setscrew hub I would stay away from because of reasons mentioned by others.