I have two Allegros and two Mondias, one of which I just recently bought from a CR member. At least until the 80's, these marques typically used a French threaded HS, which is smaller, 25 mm thread diameter versus 25.4 mm for English and Italian. But unlike French bikes that used a 22.0 mm stem, these Swiss bikes often used a 22.2 stem, meaning the wall thickness of the steerer had to be significantly smaller.
Regards,
Jerry Moos
Big Spring, Texas, USA
> From: billydavid13@comcast.net <billydavid13@comcast.net>
> Subject: Re: [CR] help needed..mondia dating and threading.
> To: Rnitro1969@aol.com
> Cc: classicrendezvous@bikelist.org
> Date: Sunday, January 3, 2010, 4:49 PM
> Hi Robbie. I don't think there's such
> a thing as a distinctly Swiss headset standard. It's almost
> certainly French. If the headset is Campy, I don't know
> what's going on and a little shimming may be your only
> recourse. But if it's another brand then it's possible the
> headtube was milled from 30.0mm [common] to 30.2mm [Campy
> and general Pro quality size] and the top cup, at least, is
> 30.0mm. This begs the question as to why the bottom cup
> isn't loose. As for the fork crown race, Standard is 27.0mm
> and Campy crown race and milling tool is 26.4mm [at least
> nominally.] I hope this helps. It's quite possible, btw, to
> jam a 30.2mm cup into a 30.0mm headtube which might make a
> subsequently installed 30.0mm cup fit somewhat loosely. Good
> luck, Mondia made some lovely bikes. Billy Ketchum; Chicago,
> IL; USA.
> ----- Original Message -----
> From: Rnitro1969@aol.com
>
> To: classicrendezvous@bikelist.org
>
> Sent: Sunday, January 3, 2010 4:30:26 PM GMT -06:00
> US/Canada Central
> Subject: [CR] help needed..mondia dating and threading.
>
> greetings.
>
> i picked up a mondia special
> serial # 153546 late 60-70's ?
> the bottom bracket seems fine
> with french stronglight
> but the head set crown race is not
> snug and the top cup is loose.
>
> is this a swiss thread thing.
>
> thanks
> robbie fellows
> lakewood,ca. usa
>
>
>
>
> _______________________________________________
> Classicrendezvous mailing list
> Classicrendezvous@bikelist.org
>
> http://www.bikelist.org/
>
> _______________________________________________
> Classicrendezvous mailing list
> Classicrendezvous@bikelist.org
> http://www.bikelist.org/
>
_______________________________________________
Classicrendezvous mailing list
Classicrendezvous@bikelist.org
http://www.bikelist.org/