The offset does provide some ankle clearance. But the reason Mavic made the change was that the straight arm was so close to the outer chainring that there was no room for any modern front derailleur. Once Simplex shut down, Mavic had no supplier of a FD with a thin outer plate. So they flared the arms to make them compatible with Shimano FDs.
Peter Jon White
Peter White Cycles
24 Hall Rd.
Hillsborough, NH 03244
603 478 0900 Phone
603 478 0902 Phax
http://www.PeterWhiteCycles.com
> I have a complete late 1980's Mavic group that I was thinking about
selling
> soon. Everything but the BB, and that is easy to find. Also I plan to keep
> the wheels, but finding hubs is not a problem. I have a newer crank, I am
> told, as the arms are not straight, but bent out to give ankle clearance.
> Only set of Mavic cranks like this I ever owned or saw. It was told to me
> that they are lighter than regular 631. A Mavic brochure I have mentions
> something about offset for ankle clearance, but I am unsure about this, as
> the 631 was celebrated for having straight arms.
>
> Contact me off N.G. if interested. I have to figure out the price. Wanted
to
> sell the stuff hung ona Bianchi 53.5 c-c TSX UL, but we'll see.
>
> Gary Jacobson
> Rosendale, NY
>
> >From: "Eric Elman" <tr4play@cox.net>
> >To: <classicrendezvous@bikelist.org>
> >Subject: Re: [CR]Mavic components
> >Date: Sat, 13 Sep 2003 08:29:25 -0400
> >
> >While on the topic of Mavic components, can someone advise what there top
> >of
> >line offerings were in 1986 (along with how to ID them)?
> >
> >I own a beautiful 1986 Peugeot PZ10 which was pretty much Peugeot's last
> >fling at a high end road lugged steel bike here in the states. It is a
> >stunning golden bronze with well executed and filed lugs w/cutouts, small
> >amounts of chrome and many unusual details. Made from 531C tubing. JB
> >carefully touched up a few small paint blemishes and then clear coated
with
> >a mix of flat and gloss to give it a less wet look and more appropriate
> >vintage shine. It was originally equipped from the factory with a full
> >Campagnolo SR (not reduced SR) group and was quite expensive in it's day
so
> >few seem to have been sold due to price and Camp SR becoming out of
> >fashion.
> >As I am now fortunate to own three other Campagnolo NR/SR equipped bikes,
I
> >want to build this frameset up with all French components and a period
> >appropriate Mavic group seems just the ticket. I was away from the
cycling
> >world in the '80's and have no experience with Mavic components or groups
> >from the period. Looking on ebay, the differences in models and year
seem
> >very difficult to differentiate.
> >
> >So, please help with guidance on what to look for.
> >
> >Please reply on-list as this is not a topic that's been covered before.
> >
> >Eric Elman
> >Somers, CT