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-   -   Threadless to threaded stem converter (https://www.bikeforums.net/general-cycling-discussion/1097555-threadless-threaded-stem-converter.html)

flik9999 02-11-17 11:58 AM

Threadless to threaded stem converter
 
Hey do any threadless to threaded stem adaptors exist? I have a bike which rides nice but I hate the look of modern stems are there any converters that would allow me to put a quill stem into my bike that takes a 1 1/8 threadless stem.

Eddie72 02-11-17 03:23 PM

Can't think of an easy way to do this. You could get a 1 1/8 threaded fork and then fit a quill to that?

SkyDog75 02-11-17 04:32 PM

Because a threadless stem also functions as the topmost piece of the headset, setting bearing preload (or just eliminating play), it's not just a matter of sticking a quill stem into the steerer tube. Plus, a threadless fork's steerer might not be built for the stresses a quill stem wedge or expander plug might exert.

One thing that should work, if you find it aesthetically pleasing enough, is a "classic style" threadless stem like the ones Velo Orange carries:
VO Tall-Stack Stem 31.8, 1-1/8" - Threadless Stems - Stems - Components

Homebrew01 02-11-17 05:25 PM


Originally Posted by SkyDog75 (Post 19371978)
Because a threadless stem also functions as the topmost piece of the headset, setting bearing preload (or just eliminating play), it's not just a matter of sticking a quill stem into the steerer tube. Plus, a threadless fork's steerer might not be built for the stresses a quill stem wedge or expander plug might exert.

One thing that should work, if you find it aesthetically pleasing enough, is a "classic style" threadless stem like the ones Velo Orange carries:
VO Tall-Stack Stem 31.8, 1-1/8" - Threadless Stems - Stems - Components

Similar thought. Threadless stem are designed for compression...the stem squeezing it. A quill stem does the opposite, pushing out from the inside (tension). You will break/crack your steerer tube.

AlmostTrick 02-11-17 06:01 PM

This is easy. Time to buy another bike!

exmechanic89 02-11-17 08:55 PM

Here's what I did, OP: I got used to the look of threadless stems and stopped worrying about it. I feel the same way - not too crazy about the way most threadless stems look, but there's just not much to be done about it.

On a side note, why do almost all threadless stems have a rise?

RoadieDropper 02-11-17 09:08 PM


Originally Posted by exmechanic89 (Post 19372515)
On a side note, why do almost all threadless stems have a rise?

Apparently you don't know the stems can be flipped.

exmechanic89 02-11-17 09:14 PM


Originally Posted by RoadieDropper (Post 19372534)
Apparently you don't know the stems can be flipped.

Wow - how clever! Thanks for pointing that out to me. :thumb:

RoadieDropper 02-11-17 09:35 PM

No problem. You'll learn a lot from this forum :)

dabac 02-12-17 12:58 AM

1 1/8" metal steerers are generally considered OK for quill type steerer tube extenders, which should make them OK for quill stems.
All you need is a way to lock and preload the headset.
Lock can be achieved with a suitably sized seat post clamp.
Preload can be set with some threaded rod, large washers and a piece of tubing.
Or a big c-clamp and a piece of tubing.

exmechanic89 02-12-17 06:12 AM

I've been surprised that over the years that no manufacturer has really come out with a line of slim, elegant looking threadless stems. You'd think there'd be a market for it with most threadless stems looking so squarish and clunky. I think someone posted a pic of a pretty nice on these forums a while back, but it was certainly the only one I'd ever seen.

anadmanni 02-12-17 06:22 AM

New to the forum, and was wondering, is it much of a hassle to convert your Threadless stem to a Quill stem? I'm partial to a more classic look. And the conversion would be taking place on a 2009 Mercier Kilo TT. Any info would be appreciate

joejack951 02-12-17 06:28 AM

I never thought I'd need to pass on this bit of information I once stumbled across but apparently there is a market for it. I present the 'Quillinator':

Quill-inator | SOMA Fabrications

Convert your threadless stem to the inferior in almost every way quill stem. Enjoy!

exmechanic89 02-12-17 07:49 PM


Originally Posted by joejack951 (Post 19372863)
I never thought I'd need to pass on this bit of information I once stumbled across but apparently there is a market for it. I present the 'Quillinator':

Quill-inator | SOMA Fabrications

Convert your threadless stem to the inferior in almost every way quill stem. Enjoy!

Wow, that is elegant! lol.

exmechanic89 02-12-17 07:50 PM


Originally Posted by anadmanni (Post 19372857)
New to the forum, and was wondering, is it much of a hassle to convert your Threadless stem to a Quill stem? I'm partial to a more classic look. And the conversion would be taking place on a 2009 Mercier Kilo TT. Any info would be appreciate

Uhm.. maybe read the very posts in this thread.


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