calstar 

I looked at a lot of online sites, no luck for this particular size. If anybody knows where that size is available, or if you have one you don't need, please let me know.

thanks.

Brian

fietsbob

Have you asked at your local bike shop yet? 27.2 - 26.8 = 0.4mm

so you need an 0.2mm thick shim..

bobotech

Beer can wrapped around the post. I forget the thickness of beer/soda cans. I think the tall cans are something like 2mm.

3alarmer

There are a gajillion used 27.2 seatposts around........A shim is not
the best solution to seatpost sizing, although if it's long enough it
will usually work..........If not long enough, the seatpost has a tenency
to cam back and forth in your seatube.

DCB0

I agree with 3alarmer. 27.2 is the most common seatpost size and you should have no trouble finding a post to proerly fit for the same price (or cheaper!) than a manufactured shim.

calstar 

This if for a 60s restoration that needs an early campy post(without the insertion line), you just can't wander into any random shop and pick one up. A post like this in excellent condition or NOS goes for about $140 up(I've seen them go for over $200 on the bay) which is too much out of pocket for this project. I have an excellent condition 26.8 campy(in box) I want to use, and although I've used beer/soda can aluminum shims before I'm looking for a shim this time. I don't want to sell what I have and then wait for a 27.2 to pop up on ebay, then have to bid for it. None of my bike friends have anything, Anyone want to trade my 26.8 for a 27.2 in equal condition?

thanks again,

Brian

dsbrantjr

Go to a hobby shop or hardware store and look at the K&S Engineering metals display. They should have various thicknesses of shim stock in brass, aluminum and (I think) tin. You will need 0.008" thickness to equal the 0.2mm you need to take up. You should be able to cut it to size with scissors. Size it so that it goes as far as possible down the seat tube for maximum support of the post. Don't forget to make some tabs at the top to keep it from dropping down into the seat tube. Grease it to keep the dissimilar metals from corroding and seizing the post and you should be good to go.

DCB0

Since you have a good seatpost that is, as you say, worth hundreds of dollars on the collector market, sell that, buy a $20 27.2mm post for now (if you plan to ride the bike rather than just display it, not that there is anything wrong with that) and wait for something better to come along.

It makes no sense to make a beercan shim on a bike you want to be peiod correct or a collector's peice... unless you can find a beer can from the right era to cut apart

calstar 

LOL..... I have a Laprade 27.2 i can use till the real deal comes along, still looking for a shim though.

thanks for all the input,

Brian

HillRider

I assume you meant 0.2 mm thick. A 2mm wall thickness is much greater than most bicycle frame tubing.