Originally Posted by
badamsjr
I have come to appreciate the ease of use with threaded headsets. They make bar height adjustments simple, and with an adjustable stem, height and reach can be fine-tuned easily.
I have threadless on some bikes too, but it is a bit more challenging to fine-tune them.
This is correct but can easily be worked around. There are adjustable threadless stems so the ability to reset the height and reach to the bars is available in threadless.
The main thing is to initially leave the fork steerer longer than you think necessary and use spacers above the stem. You do several rides while playing around with the stem's position until you finalize it. Then you cut the stem to the final height and, preferably, leave it long enough to still require a 10 mm or so spacer above the stem. For most riders, once the bar position is establshed, it won't be changed for a long time but the adjustable stem and top spacer give you some wiggle room if needed.
BTW, most quill stems have a limited range of height adjustment so they are not really much better than a threadless setup.