Re: 151 v 144 Campy cranks, wasRe: [Classicrendezvous] Campy Crankset

Aldo is correct. The Campagnolo Timeline http://www.velo-retro.com/tline.html puts the date of the 151mm bolt circle Record crank's introduction as 1958, and the 144mm bolt circle Record crank's introduction as 1968 (Catalog #16). The catalog's printing would have coincided with the trade show dates that occured late in the year.

Chuck Schmidt South Pasadena, California

swampmtn wrote:
>
> The change from 151 to 144 was probably later than that... Schwinn Paramount
> road bikes still had 151bcd at least as late as 1968.
> (snip)
>
> Aldo Ross
>
> ----- Original Message -----
> From: Harvey M Sachs <sachs@erols.com>
> To: <Philcycles@aol.com>; <roydrink@mac.com>;
> <Classicrendezvous@bikelist.org>
> Sent: Sunday, October 22, 2000 7:31 PM
> Subject: 151 v 144 Campy cranks, wasRe: [Classicrendezvous] Campy Crankset
>
> > Fortunately, there is a good visual cue to discriminate the 144 from the
> > 151. With the 144, the inner edge of the mounting bolt is only about 1 mm
> > from the shoulder on the spider. With the 151 mm circle, the same
> > measurement is about 4.5 mm, or 3/16" inch. The eye picks this up very
> > easily. This is particularly easy to spot if you just look at the
> > chainring, which will have the big gap between the inner edge and the
> > mountinb bolt for the 151 circle, and almost nothing for the 144. The
> > shoulder on the web, and the inner diameter of the inside reinforcement on
> > the chainring, are the same for both series.
> >
> > A couple of other notes:
> > --> I think that the transition on the ROAD cranks was about 1964 +/1 a
> > year or so. Track cranks continued the 151 circle for many years.
> > --> 151 road rings are much less common. Downright rare,
> > even. Particularly in smaller sizes (44 was the smallest offered, I
> > believe), because most riders of the day used half-step with sets like
> > 49/52 or 47/50.
> >
> > Enjoy!
> > Harvey Sachs
> > McLean VA, where the weekend was wonderful for riding