27.0mm vs 27.2mm seatpost
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Enjoying the Ride
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27.0mm vs 27.2mm seatpost
Can a 27.0mm seatpost be used in a 27.2mm tube? The difference in diameter is less than .008".
Thanks!
Bob
Thanks!
Bob
#3
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Took me a minute, but I eventually got it... ;-)
Seriously though, it really makes that much of a difference? I can't believe that an average seatpost has a diameter tolerance of much better than +/- .005". To think that a .008" difference would cause slippage? I've never tried it, so I'll trust your opinion, but boy that sure surprises me...
Seriously though, it really makes that much of a difference? I can't believe that an average seatpost has a diameter tolerance of much better than +/- .005". To think that a .008" difference would cause slippage? I've never tried it, so I'll trust your opinion, but boy that sure surprises me...
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Took me a minute, but I eventually got it... ;-)
Seriously though, it really makes that much of a difference? I can't believe that an average seatpost has a diameter tolerance of much better than +/- .005". To think that a .008" difference would cause slippage? I've never tried it, so I'll trust your opinion, but boy that sure surprises me...
Seriously though, it really makes that much of a difference? I can't believe that an average seatpost has a diameter tolerance of much better than +/- .005". To think that a .008" difference would cause slippage? I've never tried it, so I'll trust your opinion, but boy that sure surprises me...
Put it this way: they don't specify 26.8, 27.0, 27.2, etc. for nothin'-
#6
Sir Fallalot
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Yeah, it makes that much of a difference. There was a thread, not long ago, about this very topic, although there the problem was to fit a 27.2 mm (very common) seatpost into a 27.0 mm seat tube.
In fact, I'd need a 27.0 mm seatpost, so if you don't need it (as you seem not to), we might come to an accord. Leave me a PM if you're interested.
BTW, should I dig up that thread? It makes for a fun read.
In fact, I'd need a 27.0 mm seatpost, so if you don't need it (as you seem not to), we might come to an accord. Leave me a PM if you're interested.
BTW, should I dig up that thread? It makes for a fun read.
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I was going to say use a shim, but i looked around and I don't see any that small. I found a sheet metal gauge calculator, and that size (.008")looks like 32 gauge aluminum. you could try that if you are really attached to your seatpost.
#8
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EDIT- PS, You can get shimstock in all kinds of thicknesses (down to .0005"!) check out www.mcmaster.com. Just in case you ever need it!
wroomwroomoops: The post may be available soon. I'll have to check the exact model from home, but it's a Bontrager. I don't believe it has any setback. Once I get the wheels on the frame, I should be able to get a rough idea of what length I need, and can purchase the right diameter.
#9
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You could always try a coke can. The aluminium is very thin. I heard it done before but never did it myself. It might work.
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It will work long enough for you to test for post length, but don't really need worry about buying one too long. The last post I bought was a 350mm - just cut it to length after I was happy with the saddle height.