I have a Nitto Technomic stem that I'd like to use on a '92 trek 930 with the idea of converting it from a mountain bike to a poor man's expedition touring bike with drops.

I found this shim that would seem to do the job.

Has anyone tried this? Is it a bad idea? I can't think of any reason why, but that's why I'm throwing it out here.

  • If you're using a quill stem, you might want to look into getting a quill stem adaptor. This would allow you to use a more modern stem which are available in many more lengths and angles than traditional quill stems.
    – Kibbee
    Feb 4, 2015 at 14:10
  • Thanks, but I specifically want to use a 1" quill stem for the ability to change the handlebar height while touring, road handlebar compatibility and aesthetic reasons.
    – thewegger
    Feb 5, 2015 at 15:10
  • In that case, they also make adjustable angle threadless stems. I had one before, and I didn't really like it, as it had some movement in it. Maybe mine wasn't good quality. Anyway, I understand why you'd want to use a quill stem in this situation. Makes adjusting the height pretty easy.
    – Kibbee
    Feb 5, 2015 at 17:06
  • Totally aware of those also. Not a big fan. They're heavy, ugly and have less height adjustment when compared to a long quill stem.
    – thewegger
    Feb 5, 2015 at 18:19

1 Answer 1


I've done the opposite (but drop bars before and after), and have a quill stem adaptor to use a non-quill stem with a threaded headset. My fork is 1", but the adaptor came with a similar shim for 1 1/8" steerers. I've also used quill stems with threadless headsets, but only with matching sizes.

I don't see any reason the product you link to won't do the job it's designed for though.

To replace a non-quill stem with a quill stem you'll need something like http://problemsolversbike.com/products/locking_headset_spacers, cf. "Threadless Without Spacers" at http://sheldonbrown.com/handsup.html#threadless

I assume you are replacing a 1 1/8" quill stem on your trek though?

  • That's right, it's a 1 1/8" threaded headset/quill stem currently on the trek.
    – thewegger
    Feb 3, 2015 at 14:50

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.