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PostPosted: Tue Nov 05, 2013 2:28 pm 
Dirt Disciple

Joined: Tue May 17, 2011 1:50 pm
Posts: 17
Hi there,

I recently brought a syncros cattleprod stem for my orange aluminium o xtr but I made a mistake with the size I thought the stem was 28.6 but it was 25.4. Is there any way to convert a 25.4 quill to a 28.6?

Cheers guys.


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PostPosted: Tue Nov 05, 2013 2:43 pm 
Old School Hero

Joined: Wed Dec 29, 2010 1:04 am
Posts: 245
Location: Richmond British Columbia
you can buy a shim to convert a 22.2 quill to a 25.4 which is 1" to 1 1/8


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PostPosted: Wed Nov 06, 2013 2:57 pm 
Dirt Disciple

Joined: Tue May 17, 2011 1:50 pm
Posts: 17
Hi there,

I would need the shim to be 28.6 down to 25.4


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PostPosted: Wed Nov 06, 2013 5:21 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8202
Location: New Forest, UK
These shims often come on ahead / quill converter units. You need 1 1/8 to 1", which in steerer (outside diameter) terms is 1 1/4 to 1 1/8".

At the very worst case, two seatpost shims would do as a starting point.


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PostPosted: Wed Nov 06, 2013 6:22 pm 
Dirt Disciple

Joined: Tue May 17, 2011 1:50 pm
Posts: 17
Cheers for the info hamster.

I've been looking on eBay for something that will do the job and wondered if the long shim on the converter would do?

http://www.ebay.co.uk/itm/QUILL-TO-A-HE ... 2a32a5fa4d

The stem in my bike is 28.6 and the stem I want to fit is 25.4. I've been trying to fid a nice retro quill stem in 28.6. If a seatpost shim would work i'd use one of those.


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PostPosted: Wed Nov 06, 2013 6:51 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8202
Location: New Forest, UK
That looks just the job!


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PostPosted: Wed Nov 06, 2013 10:30 pm 
Retro Guru

Joined: Fri Jun 14, 2013 12:02 am
Posts: 683
Location: Canada
You need a 1.6mm shim. problem solvers sells such a seatpost shim because 1" seatposts (25.4mm) is a common size to shim up from.

http://problemsolversbike.com/products/seatpost_shims

Note: they say the thickness is 3.2 but that is the difference in diameter, not the thickness of the shim.. bit of an error in terminology on their part.


Last edited by cyclotoine on Thu Nov 07, 2013 6:21 pm, edited 1 time in total.

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PostPosted: Thu Nov 07, 2013 8:39 am 
Retro Guru
User avatar

Joined: Sun Mar 14, 2010 2:33 am
Posts: 2917
Location: daaan saaaf
For a quill stem, as kellyjk said, don't you need a shim from 25.4 down to 22.2, which are the internal diameters of a 1-1/8" and 1" steerer tubes respectively?

Also, it will need to be long enough to reach down into the steerer tube to where the expander wedge is.


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