Re: [CR] Cottered crank advice

(Example: Production Builders:Cinelli)

Date: Fri, 11 Jun 2010 11:55:34 -0700
From: "verktyg" <verktyg@aol.com>
To: Tom Martin <tom@voimports.com>, Classicrendezvous@bikelist.org
References: <AANLkTikaxWRm_O9-n6pSfD7YPJgSFB8ImsMogPeUF6hg@mail.gmail.com>
In-Reply-To:
Subject: Re: [CR] Cottered crank advice


Tom,

The early version Peugeot cotters had a flat the length on the 9mm diameter. Later ones were standard French, for the most part.

If your existing cotters are the old style Peugeots then you're "threaded" until you get some new 9mm French cotters.

BTW, were the original cotters tight when you removed them?

Chas. Colerich Oakland, CA USA

Tom Martin wrote:
> At the Cirque swap, I picked up a Gitane Mixte. It was in good shape and
> looked like it just needed a good washing, bearings adjusted, and the
> cotters tightened or replaced, etc.
> I have a bit of experience with cottered cranks, mostly British Raleighs and
> janky American/ Taiwanese/ Japanese bikes and thought this would be a quick
> repair/rehab, and maybe add fenders and a rack for a nice ride for DC
> excursions. I was hoping I could get it done for the upcoming DC Seersucker
> Social, but that's not gonna happen....
>
> I removed the cotters, cleaned the spindle and crank cotter holes. The
> cotters look new. I re-installed the original cotters, as I didn't have any
> new cotters in the correct dia.They just slide right through. They don't
> wedge the crank arms to the BB spindle. The original cotters, as far as I
> can tell are 9mm. I understand there are 2 different 9mm French style
> cotters- Peugeot, and 'everything else'. What are the differences between
> the 2? The flat angle? the length of the cotter?? Bikesmith Designs and
> Harris both list 'French' cotters but don;t specify whether it's Peugeot or
> the other type. Although it's only 3-6 bucks for new pins, I'm loathe to
> spend that, plus shipping only to have the same problem.I'm also not sure
> whether the cotters are the issue. Could it be the crankarm/ BB spindle
> interface- are all cottered BB spindles the same, with the only difference
> being the crank cotter bore?
>
> What do you all think I should do?
>
> Tom Martin
> Washington DC