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Paramount seatpost diameter

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Howard Rhoades

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Sep 4, 2003, 7:54:20 PM9/4/03
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I have an 1991 Schwinn Paramount series 5 road bike frame (Japan). I wonder
if anybody would know what diameter seatpost I would need. I tried my 27.2
mm but it seemed to big.
Thank you
Keith


David L. Johnson

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Sep 4, 2003, 9:31:23 PM9/4/03
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For $10 you can get a caliper... I have a Le Tour tandem frame and the
seatposts seem to be 26.6. It's about the same vintage, but you should
check your frame.

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David L. Johnson

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Mark Wolfe

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Sep 4, 2003, 11:07:53 PM9/4/03
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I have a real 1990 Paramount (aka Waterford) and it uses a 27.2.


David L. Johnson wrote:

> On Thu, 04 Sep 2003 18:54:20 +0000, Howard Rhoades wrote:
>
>> I have an 1991 Schwinn Paramount series 5 road bike frame (Japan). I
>> wonder if anybody would know what diameter seatpost I would need. I
tried
>> my 27.2 mm but it seemed to big.
>
> For $10 you can get a caliper... I have a Le Tour tandem frame and the
> seatposts seem to be 26.6. It's about the same vintage, but you should
> check your frame.
>

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meb

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Sep 6, 2003, 1:10:58 AM9/6/03
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Sheldon Brown's database says yours is supposed to be a 27.4-but you
said a 27.2 is too big not too small as would be expected.

I have a 26.8 on a Schwinn Super Sport. If your '91 is Chromoly instead
of Aluminum, Schwinn may have used common seat tubes and it might be
26.8. If, nothing else, you could get a slighty smaller seatpost and add
any necessary shims.

A more likely thought, maybe after 12 years your clamp has just
constricted the seat tube down, especially if someone had an undersized
seatpost fitted by constriction. Could try spreading it a little and
maybe you would get your 27.2 in.

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meb

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Sep 6, 2003, 1:52:26 AM9/6/03
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Sheldon Brown's database says yours is supposed to be a 27.4-but you

Mike Krueger

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Sep 6, 2003, 8:42:05 AM9/6/03
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<< maybe after 12 years your clamp has just
constricted the seat tube down, especially if someone had an undersized
seatpost fitted by constriction. Could try spreading it a little and
maybe you would get your 27.2 in. >>

Have your LBS use a reamer to bring the seat tube back to spec. They should
only charge you about $10 to do it. After doing this, they'll know for sure
what size post you need.

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