Seatpost shim - Good idea? Bad idea?
Just bought a new frame that requires a 28.0 seatpost (why?)
Anyway - I don't really fancy shelling out for a new post, so thought I'd shim an existing 27.2 one I've got. I'd have thought plastic was best for a shim, like the ones USE do, but these are only for much larger sizes. The only shims I've been able to find for 28.0 are alloy.
So my question is this, is there anything I should look out for / remember to do / be wary of in shimming a post? The frames carbon by the way. I can never remember if carbon and alloy is a really bad combination or not.
Or if anyone knows where I can get a black 28.0 seatpost without it costing the earth, I'd love to know that too.
Anyway - I don't really fancy shelling out for a new post, so thought I'd shim an existing 27.2 one I've got. I'd have thought plastic was best for a shim, like the ones USE do, but these are only for much larger sizes. The only shims I've been able to find for 28.0 are alloy.
So my question is this, is there anything I should look out for / remember to do / be wary of in shimming a post? The frames carbon by the way. I can never remember if carbon and alloy is a really bad combination or not.
Or if anyone knows where I can get a black 28.0 seatpost without it costing the earth, I'd love to know that too.
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Comments
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Colnago or WR Compositi will do you a nice 28mm post - same as a C40/C50! There's nothing wrong with using a shim - IME less likely to suffer from a seized seatpost. USE are good quality products and shims have been used for about 15 years.Make mine an Italian, with Campagnolo on the side..0
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In my experience they're terrible. I had one in my frame and it used to making a clicking noise all the time. I didn't realise that this was the cause at first and I was forever taking the bike apart etc. Eventually I did realise, removed it and got a new seat post of the correct diameter. Problem solved and I now curse shims.<a><img></a>0
