Can I shim a seatpost/seat tube?
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#27
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On a new, relatively expensive bike, I’d tend to agree but for someone rehabbing a classic / vintage bike that has suffered some level of abuse, misuse or disuse and needs a replacement seat post to bring it back to its former glory, using a shim would, IMHO & perhaps that of others, be completely acceptable. Restoration to museum quality would be an exception.
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Although Zen and the Art of Motorcycle Maintenance was a popular novel, it was also assigned reading in my engineering class. It has a lengthy scene about a shim. You should read it.
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Author and philosopher Robert M. Pirsig wrote an entire book, basically about why you are wrong! I am not making this up (although I am exaggerating a bit).
Although Zen and the Art of Motorcycle Maintenance was a popular novel, it was also assigned reading in my engineering class. It has a lengthy scene about a shim. You should read it.
Although Zen and the Art of Motorcycle Maintenance was a popular novel, it was also assigned reading in my engineering class. It has a lengthy scene about a shim. You should read it.
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To make up for a 0.2mm difference in a seat post size I did a temporary fix of using a shim made of Beer Can aluminum about 6"/15cm long 3/4"/2cm wide. Never did get another seat post and the shim is still doing just fine after 10 years...
Of course you are right and I agree... But then I would have to turn in my "Cheap Bastard" membership card... Ha
Of course you are right and I agree... But then I would have to turn in my "Cheap Bastard" membership card... Ha
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Last edited by zandoval; 07-31-22 at 09:36 PM.
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#32
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I was reading the fine print that came with my Problem Solvers 0.7mm shim. It says you should not use it with a carbon seat post, or a carbon frame. (I don't think this is specific to any particular diameter shim or thickness of shim that they make. I think it is a general directive. It does make sense because a shim focuses a force on a smaller area).
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Didn't even enter my mind. Another reason not to buy a carbon-fibre frame! You might need to use a shim! Or a bike stand...
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