Originally Posted by
NormanF
Keep your threaded quill stem. For ease of height adjustment, it can't be beat. If you need a taller stem, go with a Nitto Technomic.
About the only thing a threadless stem has going for it is you can more easily swap out bars but getting a height extension with them sucks.
Sometimes old really is better than new.
Quill adapters can be raised/lowered just like a quill stem. Same concept.
Another advantage of a quill adapter is it's much easier to swap out stems for a different length or rise.