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27mm seatposts?

Old 12-29-14, 08:17 AM
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chapel
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27mm seatposts?

seems like an 'odd duck' size from what I can dig up.
I got a nice brown saddle for Christmas and I want to get rid of my old fashioned seatpost with the crummy 'bike guts' setup.

Doesn't really need to be vintage... but wondering what I should get.
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Old 12-29-14, 08:49 AM
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Bike guts? Not sure what you're looking for, or what's wrong with what you have. 27.0 is a normal seatpost size, but not too common nowadays. I think Thomson makes one.

You also need to check that the clamping type is, and the length and setback.
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Old 12-29-14, 08:55 AM
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I have a 2 vintage bikes with 27.0 seatpost. They are not easy to find. Kalloy makes one or two models in that size. They're inexpensive and work well. Universal cycles and Niagara are good online sources that are likely to carry what you're looking for. Thomson is probably a good source but I'm not in love with a seatpost design that doesn't have any setback; they make one with setback though. Also Peter White carries a Nitto in 27.0; that is the best seatpost you can get but it will be expensive.
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Old 12-29-14, 09:33 AM
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Originally Posted by chapel View Post
... and I want to get rid of my old fashioned seatpost with the crummy 'bike guts' setup.
What they said about 27.0. They should be available. I'm really posting about the "crummy bike guts" idea. Both my Raleigh Gran Sport, a nice 531-frame bike, and the as yet untouched Le Champion, Motobecane's top-of-the-line bike at the time, came with a straight post with separate clamp. There's nothing wrong with such an arrangement that warrants the description "crummy".
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Old 12-29-14, 09:47 AM
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Mine are just crummy in general. Pretty beat up, a little rusty and from the sides with this new saddle look terrible.
My old saddle hid the guts. This has exposed rails

I guess the guts term is an old BMX term. http://www.porkchopbmx.com/Bicycle-s...MGD9340-D6.htm

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Old 12-29-14, 09:49 AM
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Originally Posted by bikemig View Post
I have a 2 vintage bikes with 27.0 seatpost. They are not easy to find. Kalloy makes one or two models in that size. They're inexpensive and work well. Universal cycles and Niagara are good online sources that are likely to carry what you're looking for. Thomson is probably a good source but I'm not in love with a seatpost design that doesn't have any setback; they make one with setback though. Also Peter White carries a Nitto in 27.0; that is the best seatpost you can get but it will be expensive.
Speaking on setback. What about using a BMX layback post? I found a GT seat post with some layback
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Old 12-29-14, 09:56 AM
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unless its a low profile saddle, you could flip the clamp and hide the fasteners under the side flaps.
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Old 12-29-14, 10:07 AM
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Not really as uncommon as some believe. I just replaced one on a 1981 Raleigh touring bike (made in Japan).

If the bike is Asian, a fluted seat post like this SR on ebay would look good, $15.26 delivered (not mine):

SR Sakae Laprade Fluted Alloy Seatpost 27 0mm Seat Post | eBay
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Old 12-29-14, 10:33 AM
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yeah, I was eyeballing that one. I think I'll jump on it.
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Old 12-29-14, 06:03 PM
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Yeah, many of us are just grey-haired old roadies. Bike guts is trying a metric second ride of the season!
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Old 12-29-14, 06:17 PM
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it's easy to take 0.1mm off a 27.2 sp with a metal file if you find one.
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Old 12-29-14, 10:37 PM
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Originally Posted by eschlwc View Post
it's easy to take 0.1mm off a 27.2 sp with a metal file if you find one.
Or shim up from a 26.x, if you have one of those sitting around. This has the advantage of making the seatpost less likely to get all scratched up when it needs to be removed, with aluminum/aluminum contact instead of aluminum/steel.

Personally, I don't mind the visible guts look, on an older bike.
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