1/2" per foot.  Wow.  I was brought up by some pretty fastidious
mechanics.  I was taught in the early 80's 2000 miles or 1/8" per
foot, whichever comes first.  Perhaps that's the reason I have always
stocked up on chains and have never replaced a cogset or chainring due
to wear in my life.

On Aug 29, 6:10 pm, CycloFiend <cyclofi...@earthlink.net> wrote:
> on 8/29/10 4:09 PM, William at tapebu...@gmail.com wrote:
>
> > 12K on one chain?  Isn't that way way way more than anyone would ever
> > recommend?
>
> Probably.
>
> On multi-geared bikes, it will tend to degrade the cassette cogs if you run
> the chain too long - i.e. past its + 1/2 "stretch" point for 12 link pairs.
> After that point, you make longer gullies in the sprocket and new chains
> will just skim right over the top.
>
> - J
>
> --
> Jim Edgar
> cyclofi...@earthlink.net
>
> Cyclofiend Bicycle Photo Galleries -http://www.cyclofiend.com
> Current Classics - Cross Bikes
> Singlespeed - Working Bikes
>
> Gallery updates now appear here -http://cyclofiend.blogspot.com
>
> "Maybe a bike, once discarded, pines away year after year for the first hand
> that steered it, and as it grows old it dreams, in its bike way, of the
> young roads."
>
> -- Robert McCammon, "Boy's Life"

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