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quill stem adapter/hacks?

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quill stem adapter/hacks?

Old 10-21-16, 07:16 PM
  #1  
Meowriano
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quill stem adapter/hacks?

ok so i recently bought a nitto dirt drop quill stem, the quill is a 22.2, for a 1' threaded fork, i want to install it on my 80's trek 950, but the fork is 1 1/8 and the current quill stem has a quill sized as 25.4, what Id like to know is if anyone has knowledge on what i can do to make the dirt drop fit my bike. is there some sort of shim or adapter?
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Old 10-21-16, 09:39 PM
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No obvious bike related source for shim on a brief search. Most shims are too short for this application anyway. If
I understand the question you need a shim with an OD of 25.4mm and an ID of 22.2mm. 22.2mm is 0.874"
so one possibility would be a foot long section of this tubing: Speedy Metals 1" OD x 0.870" ID x .065" Wall 6061 Aluminum Round Tube
You would cut it long enough to be below the end of the quill and end just below the top of the fork. You would have
to cut a slot 1/116-3/32 wide the length of the tube. A bit of a kludge but it should work with lots of lube on install.
You may never get it out. Shim needs to go to top of fork to keep stem from rattling around in fork and if not below
end of quill you won't be able to tighten the stem in the fork. Tubing listed is a bit undersized, but the stem may be
as well. Slotting the tube will help, it may be a one shot setup, banged into place without any easy option to remove
or replace. At least the tubing is cheap.

If you want to go bat s**t, you could etch the aluminum tubing with washing soda solution which slowly dissolves
the aluminum and would enlarge the ID, shrink the OD, but this is (potentially) nasty stuff, but available in grocery stores. It doesn't
work very fast, you can google it for info.

Last edited by sch; 10-21-16 at 09:54 PM.
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Old 10-21-16, 10:21 PM
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This is actually a fairly simple DIY. You need a 1" OD tube with a 7/8" (22.2) ID. if you think a moment the source of such a piece should become obvious.

It's exactly the same thing as a standard 1" fork steerer tube. You might find a piece long enough by chopping it off a crashed fork.

You'll need a piece about 3-5" long, depending on how deep the stem will go.

Once you have the raw material, you can approach the job a few ways. You can bond or sweat the tube into your fork, though I probably wouldn't. Instead, I'd make a double split about half way up, align it with the wedge of your stem, so it will spread th tube as it's drawn up. Press the assembly into the fork keeping the alignment right, then tighten normally.

Keep in mind that the orientation of the liner is critical to effective wedging, so you will have to confirm it whenever you move the stem. You might paint or file a reverence mark between the steerer and liner to make checking easier in the future.

Good luck.
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Old 10-22-16, 07:38 AM
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Originally Posted by FBinNY View Post
It's exactly the same thing as a standard 1" fork steerer tube. You might find a piece long enough by chopping it off a crashed fork.

You'll need a piece about 3-5" long, depending on how deep the stem will go.

Once you have the raw material, you can approach the job a few ways. You can bond or sweat the tube into your fork, though I probably wouldn't.
Why not bond or sweat the steerer section to the stem's quill instead. Cut it to fit the length of the quill, split at the bottom to allow the expander to spread it against the fork's steerer and epoxy it to the quill. That way you don't damage the bike's fork and you should be able to remove the stem when needed.
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Old 10-22-16, 08:31 AM
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Here's a shim and stem adapter that will work:
Bicycle bike quill stem adapter 1" 22.2mm to 1 1/8" 25.4mm threaded silver | eBay
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Old 10-23-16, 11:43 AM
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You don't need the adapter for your Dirtdrop stem, just the shim. They are available. I have one on my Trek 850.

Problem Solvers Stem Shim 1" to 1-1/8" from Bike Bling

I found it in two clicks.
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Old 10-23-16, 11:49 AM
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Originally Posted by Grand Bois View Post
You don't need the adapter for your Dirtdrop stem, just the shim. They are available. I have one on my Trek 850.

Problem Solvers Stem Shim 1" to 1-1/8" from Bike Bling

I found it in two clicks.

Not throwing stones here, just making an observation. That won't work for the OP. He needs 22.2-to-25.4.

Last edited by SquidPuppet; 10-23-16 at 11:53 AM.
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Old 10-23-16, 12:10 PM
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Originally Posted by Mr IGH View Post
The OP only needs the shim that is included with the threadless adapter. Maybe he can find one at a bike coop, leftover from when they used the threadless adapter on a 1" fork.
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Old 10-23-16, 12:13 PM
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Originally Posted by HillRider View Post
Why not bond or sweat the steerer section to the stem's quill instead. Cut it to fit the length of the quill, split at the bottom to allow the expander to spread it against the fork's steerer and epoxy it to the quill. That way you don't damage the bike's fork and you should be able to remove the stem when needed.
There's no reason, though there's also no reason to bond a split adapter in the first place. I only mentioned bonding in the context of using a liner that isn't split. (followed immediately, by saying I wouldn't do it that way)

Once you split the liner, the wedge will do the job of holding both it and the stem in place.
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Old 10-23-16, 12:26 PM
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AS Said.. There are machined shim sleeves , [the Mechanics] once they are split lengthways, the quill-wedge inside the shim tube

will expand Inside the shim, and the shim sleeve will expand into the fork steerer.
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Old 10-24-16, 06:58 PM
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Originally Posted by SquidPuppet View Post
Not throwing stones here, just making an observation. That won't work for the OP. He needs 22.2-to-25.4.
I guess I needed to click more than twice or sober up before posting. The adapter is available. It's stainless and not split at the top collar, so it looks nice and seals out water. I wanted to put some Richie/Nitto Bullmoose bars on my daughter's Trek and ordered from somewhere online. The adapter works perfectly.
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Old 10-28-16, 02:40 PM
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Originally Posted by Grand Bois View Post
You don't need the adapter for your Dirtdrop stem, just the shim. They are available. I have one on my Trek 850.

Problem Solvers Stem Shim 1" to 1-1/8" from Bike Bling

I found it in two clicks.
wouldnt the shim need to be longer? the quill itself is pretty damn long
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Old 10-28-16, 02:41 PM
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Originally Posted by Grand Bois View Post
I guess I needed to click more than twice or sober up before posting. The adapter is available. It's stainless and not split at the top collar, so it looks nice and seals out water. I wanted to put some Richie/Nitto Bullmoose bars on my daughter's Trek and ordered from somewhere online. The adapter works perfectly.
which one did you use
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Old 10-28-16, 03:03 PM
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Originally Posted by Meowriano View Post
which one did you use

I'm fairly sure there is not one manufactured in the dimensions that you need.
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Old 10-28-16, 03:13 PM
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Originally Posted by SquidPuppet View Post
I'm fairly sure there is not one manufactured in the dimensions that you need.
It's definitely made, though not necessarily sold separately. They sometimes include one quill to threadless adapters, which are usually sized for 1" forks (22.2mm - 7/8" ID) and use the adapter for 1-1/8" threaded forks (25.4mm - 1" ID).
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Old 10-28-16, 03:45 PM
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Originally Posted by Grand Bois View Post
You don't need the adapter for your Dirtdrop stem, just the shim. They are available. I have one on my Trek 850.

Problem Solvers Stem Shim 1" to 1-1/8" from Bike Bling

I found it in two clicks.
Except that the shim you showed the link to is for THREADLESS stems and the OP needs one for a QUILL stem. A quill stem adapter needs to be a bit longer than the quill so that the wedge/expander cone can engage the shim.

Cheers
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Old 10-28-16, 04:03 PM
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We've been around this particular mulberry bush a few ties already.

The adapter linked is an EXTERNAL shim to enlarge a 1" fork to accept a 1-1/8" external (threadless type) stem.

The OP needs a INTERNAL reducer shim to take up space between his 22.2mm quill and a 1" ID fork.
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