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I want to use a 27.0 seatpost w/ 27.2 bike(6 posts)

I want to use a 27.0 seatpost w/ 27.2 bikepaulyjsob
May 31, 2001 8:30 AM
I want to use my old 27.0 seatpost on my new frame, which has a 27.2 seat tube. Does anyone know where I can get a shim or what can I make one out of? Thanks!
You know, I've seen them on the Internet, but heck if I canbill
May 31, 2001 9:00 AM
remember where. I even poked around a little for you, but I can't find them.
Shims could be something that your LBS has hanging around in the "everything" drawer. I wouldn't fake it, myself, with a Coke can or something, because of sharp edges, wrong sizing, etc., that may create more problems than it solves. Proper shims are out there -- I believe that my Wound-up seatpost is made in a 27 mm with a shim they provide automatically for a 27.2 seat tube, but their website doesn't really say.
Coke can.J.S.
May 31, 2001 9:29 AM
Your never going to find a manufactured shim that's .2mm(.008") thick. First I woild try the post without anything and see if it tightens, if not cut up a soda can and use that as a shim.
Coke can.Steevo
May 31, 2001 1:42 PM
I would use an aluminum soda can. I have used aluminum soda cans before. JS is correct except that the shim would be .1mm (.004") thick. Remember this is for a diameter so the difference must be divided by 2 to get the actual shim wall thickness.

NFW to get a manufactured shim .002" thick.
shim stock...C-40
May 31, 2001 4:05 PM
can be purchased in .001 inch increments in any thickness from .001 inch on up. The coke can is .004 inch thick, which is just right.

Check out mcmastercarr.com for a wide variety of shim stock material.
Just run it. Your talking about 1/5 of a mm! nmrailer
May 31, 2001 2:15 PM