Measuring BEFORE you do a lot of work is a GOOD thing...found that out the hard way. Pulled the old bar and quill from a bike I was rebuilding. Pulled the bar and brake levers, put them on a nice Nitto with a bit more reach....JUST what I needed on this ride...Put the bars in the quill, put the levers on...and went to put it on the bike to adjust....NOOOOOOOOOPPPPPE! Wrong Size!!! Head/Steering Tube...SCHWINN SIZE.....NOT a match to the Nitto stem...OOPs.