Hi, John, All--
Thanks so much for the response, and for taking the trouble to check with your brother regarding his Ideor frameset. I genuinely appreciate it. It's very curious, the 26.8 number, because the seller of the frameset, an Italian bike aficionado, also told me it is was 26.8, and so I bought a Campy seatpost in that size almost immediately.
Let me tell you, after trying to force the thing into the seat tube, even heavily greased, and succeeding only in gouging up the post and (I feared) being on the verge of splitting the tubing itself, I stopped.
I wonder if the two years difference in model years between your brother's bike and mine might be enough to account for a difference in seattube diameter. The fellow who sold me the frameset also owned a '57, and his statement as to the seatpost size on mine might have based on his experience with the earlier frameset. All I know is, 26.8 into mine won't go, and even 26.2 is going to require a level of muscle I'm hesitant to apply. Hmmm....
Ideor offered the Asso in I think five different model levels, relating primarily to coponent mixes. Except for the lowest level model, which used Mannesmann tubing, they all used Columbus, including mine, the lower-mid-level Asso "Olimpic." The top "Professional" model had a Campy cotterless chainset and Sport headset, etc., the lower models had Magistroni cottered chainsets and Ideor-branded Magistroni headsets. But as I say, all tubing except for the model below mine was Columbus.
So either the diameter of the tubing changed over the course of a couple of years, or it changed model to model, or perhaps even from frame size to frame size? You say your brother's bike is a 53cm. Mine is a 64cm. Would a narrower diameter tubing make for a stiffer frame at the larger size? I would have thought the opposite. I'm delving into territory I know almost nothing about here.
I guess I have to keep the question open...
Thanks again,
Peter
Peter Jourdain
Whitewater, Wisconsin
> Peter Jourdain asked a few days ago about seat post
> size for a Ideor Asso
> with Columbus Tubing.
>
> Finally got an answer from my brother who has one,
> his is a 1958 53cm (ctc)
> example, which may make a difference.
>
> His is 26.8mm!
>
> Perhaps lighter gauge tubing in the smaller sizes?
>
> The Campagnolo headset and seat post are original
> to the bike, all else was
> updated over 30 years ago.
>
> John Jorgensen
> Palos Verdes Ca
>
> Where I advised him the headset is the majority of
> value of his bike.
>
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