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#1
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27.2/26.8 mm seatpost in a 27.0 mm tube??
My Marin has a 27.0 mm seat tube but these seems to be going obsolete
now and the closest seat posts I see are 27.2 mm or 26.8mm. Is it possible to squeeze one in? Or get a 26.8 mm and wrap tape around the contact area? Ideally I would like a carbon post to reduce road vibrations but from reading about them they are dodgy anyway so would this be very unwise? Maybe a titanium post would damp vibrations and remain strong?? Richard |
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#2
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27.2/26.8 mm seatpost in a 27.0 mm tube??
Earthstick wrote:
My Marin has a 27.0 mm seat tube but these seems to be going obsolete now and the closest seat posts I see are 27.2 mm or 26.8mm. Is it possible to squeeze one in? Or get a 26.8 mm and wrap tape around the contact area? Ideally I would like a carbon post to reduce road vibrations but from reading about them they are dodgy anyway so would this be very unwise? Maybe a titanium post would damp vibrations and remain strong?? Richard Neither one of your ideas is good. Forcing a larger post into your seat tube would damage your bike. Wrapping tape around a smaller post would work poorly and only for a short time at best. The best thing to do would be to buy a post of the correct size. Thomson makes one of the better seat posts and in the size you need. The sdcond best thing would be to buy a smaller diameter seat post, say a 25.4 and buy a 1.6 shim to fit your 27.0 seat tube. |
#3
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27.2/26.8 mm seatpost in a 27.0 mm tube??
Thomson still makes a 27.0, and will likely outlast your frame. Awesome
seat post. FWIW, I fit a 30.9 seat post into my 30.8 seat tube and she slides up and down real easy when loose. The thing to worry about most is a stuck seatpost. Always use grease. Do not wrap tape around the post. Always use grease. Stay away from Titanium as they tend to seize more frequently. Always use grease. Carbon is not bad because it will not seize, but will probably not dampen the ride except in your mind. Did I mention to use grease? Chris |
#4
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27.2/26.8 mm seatpost in a 27.0 mm tube??
Earthstick wrote: My Marin has a 27.0 mm seat tube but these seems to be going obsolete now and the closest seat posts I see are 27.2 mm or 26.8mm. Is it possible to squeeze one in? Or get a 26.8 mm and wrap tape around the contact area? Ideally I would like a carbon post to reduce road vibrations but from reading about them they are dodgy anyway so would this be very unwise? Maybe a titanium post would damp vibrations and remain strong?? Richard First, don't expect any seatpost of any material to dampen your ride vibration, use wider tires. Second don't squeeze an off sized SP into the frame. Get a good LBS to ream the 27mm to 27.2mm, then use any 27.2mm seatpost. |
#5
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27.2/26.8 mm seatpost in a 27.0 mm tube??
Earthstick wrote:
My Marin has a 27.0 mm seat tube but these seems to be going obsolete now and the closest seat posts I see are 27.2 mm or 26.8mm. Is it possible to squeeze one in? Or get a 26.8 mm and wrap tape around the contact area? Ideally I would like a carbon post to reduce road vibrations but from reading about them they are dodgy anyway so would this be very unwise? Maybe a titanium post would damp vibrations and remain strong?? No difference this rider can feel. Whatever you do, use a 27.0 or a smaller post with a metal liner cut to 27.0*. Seatlugs and frames really do fail with the wrong size post. [*U.S.E. for example has a 25.0 post with a 27.0 sleeve] -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 |
#6
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27.2/26.8 mm seatpost in a 27.0 mm tube??
On Fri, 29 Jul 2005 04:28:27 -0700, Earthstick wrote:
Or get a 26.8 mm and wrap tape around the contact area? tape? Don't be a slob. Get a can of beer. Drink. Cut aluminum square from can, wrap around and epoxy to post low enough so it won't be seen, or if it is seen keep the beer logo towards the post. Shimtastic. |
#7
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27.2/26.8 mm seatpost in a 27.0 mm tube??
The epoxy would need to be distributed reeeal evenly or else it won't
be uniform, causing pressure points in the seat tube. Probably wouldn't do much since the seat tube doesn't see much stress, but still. Shims @ the LBS are cheap! Phil, Squid-in-Training |
#8
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27.2/26.8 mm seatpost in a 27.0 mm tube??
" Carbon is not bad because it will not seize, but will probably not
dampen the ride except in your mind." Maybe a rain jacket for the dampened ride? Phil, Squid-in-Training |
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