Sloggy Posted March 22, 2010 Share Hi all please tell me the simplest way to tell what size seat post isthe make is fsa sl - 250 comes in the sizes. 27.2 31.6 how do i know? want to replace with a seat post that has zero set back. PS happy to swop with someone who wants the revearse Link to comment Share on other sites More sharing options...
Scoe Posted March 22, 2010 Share it's the diameter... measure yor current one and get the same... be careful, that seat post may only come in one size, but there are MANY different sizes Link to comment Share on other sites More sharing options...
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