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Seat post fit

Old 02-25-24, 08:14 PM
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Seat post fit

I have a Pinarello Treviso with a 27.2 seat tube but my seat post won't fit. Is there a way to open the seat tube up a bit?? Thank you, Mike
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Old 02-25-24, 08:48 PM
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I have a Pinarello Treviso with a 27.2 seat tube but my seat post won't fit. Is there a way to open the seat tube up a bit?? Thank you, Mike
How about some more info so somebody can give you reasonable instructions on how to solve your problem.
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Old 02-25-24, 09:31 PM
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Clark W. Griswold
 
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If your seatpost is 27.2 and the seat tube is the same you shouldn't have issues so long as your seatpost clamping is loose enough. If something is off ,which we have no idea, then it won't work.

I have a feeling there is more to your story and of course since you really didn't give us much it I guess it is Boston (more than a feeling).

Do not open anything up, do not use a hammer do not use and destructive methods. If you you have a metal frame you can use the proper honing tool and hone it out, that may help a bit. Also make sure everything is measured properly (which would mean measuring twice and maybe in two different spots) My Phil Wood frame which is a '94 steel frame was measured incorrectly at 27.2 because I guess someone measured once so I ended up having to sand down a Thomson post as they don't make a silver one and I wasn't going to buy a non-silver post for the bike and wanted it to also be MUSA.
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Old 02-26-24, 12:50 AM
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The Pinarello came with a 27.2 seat post but it was not installed. I have a 27.0 seat post on hand that I tried and it fit perfectly. Funny, but all my other steel road bikes had 27.2 seat post. Well this works and thank you for the responses.
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Old 02-26-24, 12:07 PM
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Clark W. Griswold
 
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Originally Posted by mymikesbikes
The Pinarello came with a 27.2 seat post but it was not installed. I have a 27.0 seat post on hand that I tried and it fit perfectly. Funny, but all my other steel road bikes had 27.2 seat post. Well this works and thank you for the responses.
There are a lot of different sizes out there and people do a lot of different stuff, my early 80s (or possibly late 70s) Cilo had a 26.8, we had a 90s steel Trek I believe that was 26.4 or something odd. Generally seat posts have been all over the place. Now it has gotten a touch better with 27.2, 30.9 and 31.6 and 34.9 but you still find some anomalies.
Glad you got it working.
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