New 9s Cranks Compatible with 7s setup?

Mike Beauchamp said:

Heyo, I want to replace my 10 year old chainrings on my mountain bike,
which is 7s
LX/XT stuff. (I've only replaced the middle ring once before, about 6
years ago).
I'm also considering replacing the whole crank because there isnt' much
of a cost difference, but I'm wondering if a new "9 speed compatible"
crank would work with 7 speed chain and derailleurs and rapidfire
shifter? Or is the spacing completely different.. I can't seem to find
this information anywhere. Thanks
Mike http://mikebeauchamp.com/http://mikebeauchamp.com

The interior width of the chain is the same for 7/8/9/10 speed so
it will work

--

Mike Beauchamp said:

... I'm wondering if a new "9 speed compatible" crank would
work with 7 speed chain and derailleurs and rapidfire shifter? Or is the
spacing completely different.. I can't seem to find this information
anywhere. Thanks

It works just fine. Sprockets are, to date, backwards-compatible with
setups that have fewer speed than the current spec.
--
Typoes are a feature, not a bug.
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Quoted message said:

Quoted message said:

... I'm wondering if a new "9 speed compatible" crank would
work with 7 speed chain and derailleurs and rapidfire shifter? Or is the
spacing completely different.. I can't seem to find this information
anywhere. Thanks

It works just fine. Sprockets are, to date, backwards-compatible with
setups that have fewer speed than the current spec.

In my experience, chain choice becomes more important when you're running a
7-speed system on a 9-speed crankset. I would stay away from 6/7 speed
chains and use something specifically made for a 7/8 speed setup in such
situations. I've had very good luck with HG91 chains, while IG-series
haven't worked so well.

--Mike-- Chain Reaction Bicycles
www.ChainReactionBicycles.com

Hmm.. okay, thanks a lot.
There's also somethign to be said for keeping my original crank and
everything and just replacing the rings. It's nice having an all-stock
bike.. especially when it was your first "real" bike.

Mike
http://mikebeauchamp.com

"Mike Jacoubowsky" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

Quoted message said:

... I'm wondering if a new "9 speed compatible" crank would
work with 7 speed chain and derailleurs and rapidfire shifter? Or is

the

Quoted message said:

Quoted message said:

Quoted message said:

spacing completely different.. I can't seem to find this information
anywhere. Thanks

It works just fine. Sprockets are, to date, backwards-compatible with
setups that have fewer speed than the current spec.

In my experience, chain choice becomes more important when you're running

a

Quoted message said:

7-speed system on a 9-speed crankset. I would stay away from 6/7 speed
chains and use something specifically made for a 7/8 speed setup in such
situations. I've had very good luck with HG91 chains, while IG-series
haven't worked so well.

--Mike-- Chain Reaction Bicycles
www.ChainReactionBicycles.com

news-<< but I'm wondering if a new "9 speed compatible" crank would
work with 7 speed chain and derailleurs and rapidfire shifter? >><BR><BR>

Yes...

Peter Chisholm
Vecchio's Bicicletteria
1833 Pearl St.
Boulder, CO, 80302
(303)440-3535
http://www.vecchios.com
"Ruote convenzionali costruite eccezionalmente bene"