Paramount seatpost diameter

Howard Rhoades said:

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.

--

David L. Johnson

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extreme, but that they are intolerant. (_)/ (_) | --Robert F. Kennedy

I have a real 1990 Paramount (aka Waterford) and it uses a 27.2.

David L. Johnson said:

Howard Rhoades said:

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

Quoted message said:

Quoted message said:

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.

--
Mark Wolfe wolfenet.orgwolfenet.orgOpen ↗ gpg fingerprint = 42B6 EFEB 5414 AA18 01B7 64AC EF46 F7E6 82F6
8C71 `First Up Against The Wall When The Revolution Comes! Woohoo! So long as they promise to use
latex gloves, I'm happy. 🙂'
- Thorfinn, in the Monastery.

Quoted post said:

Originally posted by Howard Rhoades
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

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.

Quoted post said:

Originally posted by Howard Rhoades
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

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.

<< 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.