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ISO 22mm seat post for my Peugeot

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ISO 22mm seat post for my Peugeot

Old 01-26-16, 10:25 AM
  #1  
mrkvnmnnn
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ISO 22mm seat post for my Peugeot

I am in need of a 22mm seat post for my peugeot. My bike has been out of commission for almost a month now and I am getting pretty desperate. Please let me know if you have one of these seat posts you are willing to part with. I would be willing to buy a few!
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Old 01-26-16, 11:37 AM
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Is this for a UO-8? They were 22mm with shim, and 25.4 without shim as I recall. You may have a better chance of finding the 25.4.
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Old 01-26-16, 12:34 PM
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If it's a UO-8 or similar (UO-18, AO-8, AO-18, etc.), then dweenk's suggestion might be the easiest course of action. Those bikes had a shim in the seat tube that should slide out without much effort. Pop the shim out and you should be able to find a seatpost that'll fit. If you search the web, you'll find widely varying reports of the actual seat tube size, so it's probably a good idea to have yours measured. A decent bike shop should have a tool like a graduated post they use to measure seat tubes.

Another possibility: Having a UO-8 myself, I know that seat tube/shim/post arrangement isn't exactly a precision fit. You might be able to use a BMX 7/8" post. 7/8" works out to about 22.2 mm, but there might be enough variation in tolerance to make it work without having to ream anything.
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Old 01-26-16, 02:39 PM
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Originally Posted by dweenk View Post
Is this for a UO-8? They were 22mm with shim, and 25.4 without shim as I recall. You may have a better chance of finding the 25.4.
The tubes without the shim are 25.5. Get a 25.4 seat post and use a thin shim (using metal from a pop can or the like) to ensure it clamps tightly. I have done that on my AO-8 and it works very well.
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Old 01-26-16, 05:37 PM
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I tried a 22.2 and it was too tight! I also work at a small bike shop in my town and measured the original seat post and it was 22mm!
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Old 01-26-16, 06:27 PM
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...if you really can't find one online, and that 22.2 post is aluminum alloy, it does not take much work with a coarse abrasive sheet to take it down to where it will fit your frame tube. If you can chuck it in a drill press or similar, it goes even quicker, and you have to use some restraint not to reduce it too much. If it's a steel post, it's a lot more difficult to do.
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Old 01-26-16, 06:52 PM
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Rocky Gravol
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I put a 24mm post in my UO10

https://www.bikeforums.net/classic-vi...l#post17163738

I have the old one somewhere.
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Old 01-27-16, 08:18 AM
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I took the shim out and a 25.4 fits but a 26.0 does not fit. The 25.4 seems a little loose.
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Old 01-27-16, 10:52 AM
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Originally Posted by mrkvnmnnn View Post
I took the shim out and a 25.4 fits but a 26.0 does not fit. The 25.4 seems a little loose.
Sounds like a measurement would be helpful. Or ream it to a known size. Or try 25.6 & 25.8 mm seatposts.

Niagara Cycle has a selection of inexpensive 25.6 and 25.8 mm posts, if you want to go that route:
Components - Seatposts - 25.8 - Niagara Cycle
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Old 01-27-16, 11:19 AM
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Try 3" by 3" coke can shim. My Mooney has been using one for the past 20 years because I really like that (slightly undersized) seatpost. First class fit, No reason to change anything. (Well I do put in fresh shims every time I pull the post, but not when I am just adjusting the height.)

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Old 01-27-16, 11:38 AM
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Originally Posted by mrkvnmnnn View Post
I took the shim out and a 25.4 fits but a 26.0 does not fit. The 25.4 seems a little loose.
...are you aware that seat posts generally come in increments of .2 cm ? IOW, if youi go online, you will find some cheap Kalloy posts in 25.6 and 25.8. You just need to figure out which one you need.

Last edited by 3alarmer; 01-27-16 at 01:14 PM.
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