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Diameter Difference

Old 05-12-20, 05:51 PM
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jetignacio
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Diameter Difference

Will there be a significant effect on a 0.02 difference in terms of diameter size on a seatpost? I'm currently building an rb project and I don't have my frame with me to check since it's currently undergoing a paint job. My last recollection of st diameter was at 26.8, but what I see available (2nd hand) on the net are 27.0 sizes. Old school parts does not come easy nowadays especially in my country so I'm having hesitations of taking a chance since there's only a 0.02 difference. It may work or it may not, but just to be sure and put my money not to waste I want to get your valuable comments first. TIA
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Old 05-12-20, 06:14 PM
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SalsaShark
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Get the correct post size. If it is too big, it will not work at all. Too small, it can be shimmed, but if you are buying one anyway, so just get the correct size. While it doesn't sound like much, being oversized in diameter by 0.2mm will make the 27.0 post unuseable in that frame.
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Old 05-12-20, 07:03 PM
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Originally Posted by jetignacio View Post
Will there be a significant effect on a 0.02 difference in terms of diameter size on a seatpost? I'm currently building an rb project and I don't have my frame with me to check since it's currently undergoing a paint job. My last recollection of st diameter was at 26.8, but what I see available (2nd hand) on the net are 27.0 sizes. Old school parts does not come easy nowadays especially in my country so I'm having hesitations of taking a chance since there's only a 0.02 difference. It may work or it may not, but just to be sure and put my money not to waste I want to get your valuable comments first. TIA
Agree with SalsaShark - donít do it. Make sure & get the right size. Better to wait now and save yourself periodic hassle from now on.
(Itís .2 difference, not .02)
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Old 05-12-20, 07:38 PM
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jetignacio
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You're right. I might be just too anxious knowing that retro parts really don't come easy. And if incase someone pops it up for sale it surely not cheap.
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Old 05-12-20, 09:19 PM
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26.8 is also a fairly common size for older posts, I've dealt with jammed posts and that .2mm might not seem like a lot till you have to adjust the post with giant pliers, someone else holding the bike and a lot of swearing and sweating.
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