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Old 06-29-17, 08:11 PM   #1
fold
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1inch(25.4mm) threaded to 1 1/8inch(28.6mm) threadless adapter

Hi Forum of folding bikes, Good Evening!

I am looking for a part to extend my folding bike's front post. The adapter should be solid on both end except a hole for the long screw to go through. It's hard to find because the 1 1/8 inch end has to be at least 6 inch long.

Attached please find a picture of the bike. The inner diameter of current front post is 1 1/8inch(28.6mm). Current adapter is also 1inch(25.4mm) threaded to 1 1/8inch(28.6mm) threadless, but it's too short on the 1 1/8 inch end. I need it to be longer so that I can lift the entire post with handlebars more (with some spacers to go into the gap created).

Any info is appreciated. I found several items but they don't look like right fit.
This one: https://www.amazon.com/Sunlite-Cromo...ZD5XY04MCZ5Y4P
It's fat end is hollow with an inner diameter at 25.4mm. Hence it's an extender instead of an adapter.

Another one: https://www.amazon.com/gp/product/B0...=ADIKZAFTSWMNW
It looks hollow on the fat end too.

3rd one: SpeedPark 2052-594 Insert Conversion for Bike 28.6mm Stem / 22.2mm Fork - SLV | eBay
Its size for thinner end is unknown 'cuz it's said to be 1-inch(22.2mm), but 1-inch is actually 25.4mm. Also it has some kind of hook on the fat end, which might be a good indicator for hollowness as well. Unless it's a cap?
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Old 06-29-17, 09:27 PM   #2
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It's hard to see what is going on at the top of the post. Could you post another pic?
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Old 06-29-17, 09:43 PM   #3
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I am having trouble understanding exactly what you need, so forgive me if this isn't what you need, but Velo Orange has a 180 mm one that might work.
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Old 06-29-17, 10:31 PM   #4
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Quote:
Originally Posted by jur View Post
It's hard to see what is going on at the top of the post. Could you post another pic?
Thanks @jur I plan to take it apart over the long weekend. I will post then.
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Old 06-29-17, 10:38 PM   #5
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thanks @jur and @12boy
Sorry for the confusion. Basically I need something like this but much longer on the fat end:
Dimension Steerer Adaptor 1 quill to 1-1/8 Threadless Black
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Old 06-30-17, 09:06 AM   #6
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Quote:
Originally Posted by fold View Post
thanks @jur and @12boy
Sorry for the confusion. Basically I need something like this but much longer on the fat end:
Dimension Steerer Adaptor 1 quill to 1-1/8 Threadless Black
The device that you referenced here simply allows you to use a threadless stem on a threaded headset. Is your goal to increase the height of your handlebar?
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Old 06-30-17, 10:55 AM   #7
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Quote:
Originally Posted by Pinigis View Post
The device that you referenced here simply allows you to use a threadless stem on a threaded headset. Is your goal to increase the height of your handlebar?
@Pinigis yes, I want to increase the height of the handlebar and put some spacers in the gap.
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Old 06-30-17, 10:58 AM   #8
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@jur @12boy Here are more pictures.
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File Type: jpg IMG_20170630_093517.jpg (100.9 KB, 73 views)
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Old 06-30-17, 10:59 AM   #9
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@all
Correction: the thinner end's outer diameter is 22.2mm. Just measured this morning.
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Old 06-30-17, 11:13 PM   #10
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Add a picture of current adapter.
It's threaded to threaded, correct?
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Old 07-01-17, 01:25 PM   #11
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I do not believe those adapters are designed to be used daisy chained together. Use one and one only not one on top of another on top of another which is a daisy chain. Please do not quote me on this as I then have to go through and get rid of them on my account. I can and do go back on my own and look at posts. Multiple use of those adapters could lead to a catistrophic failure. They are designed to work with leverage put on by one of them not by several of them. Roger
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Old 07-03-17, 07:00 PM   #12
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Is this what you are looking for:
High Rider Stem Adapter 28.6/22.2 | SOMA Fabrications

I used one of these on my Raleigh Twenty.
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Old 07-03-17, 10:35 PM   #13
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@veloceleste Thanks!!!
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Old 07-16-17, 09:18 AM   #14
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It's done. 1 longer adapter + 3 x 20mm Carbon Fiber spacers
Thanks for all the info!
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