Re: [CR] Interesting chainring page

(Example: Component Manufacturers:Avocet)

From: "Joe Bender-Zanoni" <joebz@optonline.net>
Subject: Re: [CR] Interesting chainring page
To: Mark Bulgier <mark@bulgier.net>, classicrendezvous@bikelist.org
References: <C102531FB711D411B5B90060B0A468760DAF5E@mail.bulgier.net>
Date: Tue, 01 Oct 2002 00:07:41 -0400

There is a shop near the velodrome north of Minneapolis that will modify chainrings to fit either bolt circle. MN guys- speak up with the name (or their machinist).

Joe Bender-Zanoni
Great Notch, NJ


----- Original Message -----
From: Mark Bulgier
To: classicrendezvous@bikelist.org
Sent: Monday, September 30, 2002 10:52 PM
Subject: RE: [CR] Interesting chainring page



>
> Greg Parker enthused:
> >
> > Note also the one shown right below that:
> >
> > "Campy Pista crank with 144-bcd and 151-bcd"
> >
> > Now *that's* versatility!
>
> I've made a few of those, once by hand filing, a couple with a milling
> machine. I don't recommend the hand filing technique unless you're pretty
> good with a file and quite patient - a little too much off and you've got a
> sloppy fit, with most likely only one bolt out of five taking all the
> strain. Any machinist can do 'em on the mill.
>
> Strada is easier than Pista, as Pista needs the counterbore on the backside
> of the spider. I hardly have to mention you can't do the counterbore with a
> file, that's for the mill only. Well, maybe Brian could if we dared him to,
> but no one with only two arms could file that. Pista leaves the head of the
> nut partly unsupported, possibly a little weaker than the factory setup, but
> with a road double it's as good as new - and after the rings are mounted
> it's almost impossible to tell the arms are modified.
>
> You still have the 44-tooth minimum of the 151, but you can get there with
> far more common 144mm rings. You might could modify the arms a bit more to
> squeak a 43 in there, I don't know, never tried, but no way on the 42.

>

> Mark Bulgier

> Seattle, Wa

> USA