I don't know why it is so hard for some to do this...I just put the wheel loosely in the drop outs without tightening the wheel in place, adjust the chains so that when I push the wheel back and forth in the drop outs, I can see where it is tight or too loose, add or pull links accordingly and tighten the axles into the drop outs where the chains have no more than a half inch bounce...Works everytime for me and I have still never had to use a half link yet...lol.