This question may have been asked and answered before, but when I did a search, it either wasn't there or I missed it. If a repeat, please forgive the repetition.

My question is this: Assuming I have an aluminum frame designed for and currently fitted with a 1&1/8" threadless (Cane Creek) headset, is it possible to refit the frame with an adapter that will allow either a 1" or a 1&1/8" threaded headset, fork, and stem?

Please ignore, for the moment the advisability of doing this, and focus only on the feasibility of doing it. I scoped out Nashbar for such an adapter and came up dry.

Thanks!

ok, so u have a 1 and one eight threadless. em u can go out and buy a one and one eight threaded headset but thats the start if it, then u have to go buy a stem and then buy a fork with the screw on gruves on it.chainging from one to another can be pricey if uve noticed. why would u change, threadless is an 80s thing

It can easilly (but not cheaply) be done, unless the current headset is of the integrated type.

Threaded is the tool of Satan, no sense in going backwards.

Trying to get a specific height AND a specific reach in threadless is tricky. Once the fork is cut, you're limited in height unless you use a heavy, ugly stem extender of questionable safety. The other option is to use a "comfort" stem with a 45 degree angle. If you can't match the angle and reach you need, you just don't get the fit you want.

With threaded stems, one can raise or lower the stem easily (and without having to readjust the headset bearings every time). Also, with threaded stems, a large variety of VERY inexpensive used stems are available in different angles, reaches, and colors.

Threaded forks/stems/headsets may be "an 80's thing" (I think of them more as a 60's thing, but they're actually much older than that), but they have some virtues that aren't easily matched by threadless setups.

Bull!

Assuming it's a traditional non integrated HS your best bet for threaded is to go 1". There are reducer bushings for the headtube in the QBP,then you need fork HS and quill stem.

Thank you, sydney. Pardon my ignorance, but what is QBP? I have spare fork, HS, and quill stems in spare parts.

Quality Bicycle Parts catalogue.. Check at www.harriscyclery.com

Quality Bicycle Parts. A major distributor of parts. Many bike shops can order parts from them, and a Google search will hook you up with ones that will do it online for you.

Based on your description of the problem, another alternative is an adjustable threadless stem, like this one:

https://www.nashbar.com/profile.cfm?c...eid=&pagename=

Thirteen bucks from Nashbar.

i believe J&B Importers, another large distributor. also now carries reducer bushings, although i don't have the catalogue on-hand to be sure.

Thanks for the responses, folks. I plan to try an adjustable threadless first. If that doesn't get me where I want, I'll look into other options. I appreciate the prompt and helpful advice!