9sp crankset with 8sp everythingelse - will it work?

Hi again,

I need to buy a new crankset. It looks like there's far more
choice in 9sp-compatible cranksets than 8sp cranksets. But
all the componentry on my bike is currently 8sp. So - will a
9sp crankset work on my 8sp derailleurs, chain and cassette?

I've done some research on the web and I'm now a little
confused. Some people say a 9sp crankset will work just
fine. Others say the 9sp crankset have reprofiled pick-up
teeth that won't work with an 8sp chain so you have to
change the chain to a 9sp chain. The 9sp chain will work
fine with the 8sp cassette and derailleurs. But I'm not keen
on the idea of a 9sp chain because I've read that 9sp
components wear down up to twice as fast as 8sp components.

Help!

I currently have my eye on an M572 LX splined 9sp crankset
and an XT ES71 splined BB.

Thanks, Jack

On Wed, 7 Jul 2004 14:29:42 +0100, "Daniel Kelly \(AKA Jack\)"
<d.kellyNOSPAM@NOSPAM.ucl.ac.uk> wrote:

>Hi again,
>
>I need to buy a new crankset. It looks like there's far
>more choice in 9sp-compatible cranksets than 8sp cranksets.
>But all the componentry on my bike is currently 8sp. So -
>will a 9sp crankset work on my 8sp derailleurs, chain and
>cassette?

Yes. There is no problem with that.
--
Typoes are a feature, not a bug. Some gardening required to
reply via email. Surrealism is a pectinated ranzel.

"Daniel Kelly \(AKA Jack\)" <d.kellyNOSPAM@NOSPAM.ucl.ac.uk> wrote:

>I need to buy a new crankset. It looks like there's far
>more choice in 9sp-compatible cranksets than 8sp cranksets.
>But all the componentry on my bike is currently 8sp. So -
>will a 9sp crankset work on my 8sp derailleurs, chain and
>cassette?
>
>I've done some research on the web and I'm now a little
>confused. Some people say a 9sp crankset will work just
>fine. Others say the 9sp crankset have reprofiled pick-up
>teeth that won't work with an 8sp chain so you have to
>change the chain to a 9sp chain. The 9sp chain will work
>fine with the 8sp cassette and derailleurs. But I'm not
>keen on the idea of a 9sp chain because I've read that 9sp
>components wear down up to twice as fast as 8sp components.

A 9 speed crank will work fine with an otherwise 8 speed
drivetrain. The only real difference is going to be a
slightly smaller space between the two chainrings - hardly
enough to get excited about.

Mark Hickey Habanero Cycles http://www.habcycles.com Home of
the $695 ti frame

Thanks for your advice, everyone. I've just placed an order
for Shimano LX M571 splined crankset and a 121mm LX ES51
splined BB. Goody!

Jack.

"Mark Hickey" <mark@habcycles.com> wrote in message
news:h20oe09ni1uh1u2rad1fmv3905fdoj1u2a@4ax.com...
> "Daniel Kelly \(AKA Jack\)"
> <d.kellyNOSPAM@NOSPAM.ucl.ac.uk> wrote:
>
> >I need to buy a new crankset. It looks like there's far
> >more choice in 9sp-compatible cranksets than 8sp
> >cranksets. But all the componentry on
my
> >bike is currently 8sp. So - will a 9sp crankset work
> >on my 8sp
derailleurs,
> >chain and cassette?
> >
> >I've done some research on the web and I'm now a little
> >confused. Some people say a 9sp crankset will work just
> >fine. Others say the 9sp
crankset
> >have reprofiled pick-up teeth that won't work with an 8sp
> >chain so you
have
> >to change the chain to a 9sp chain. The 9sp chain will
> >work fine with
the
> >8sp cassette and derailleurs. But I'm not keen on the
> >idea of a 9sp
chain
> >because I've read that 9sp components wear down up to
> >twice as fast as
8sp
> >components.
>
> A 9 speed crank will work fine with an otherwise 8 speed
> drivetrain. The only real difference is going to be a
> slightly smaller space between the two chainrings - hardly
> enough to get excited about.
>
> Mark Hickey Habanero Cycles http://www.habcycles.com Home
> of the $695 ti frame

I'm running 9 speed cranksets with 8 speed chains,
cassettes and shifters on two MTBs right now - an XT FC-
M760 w/ the integrated BB on my hardtail and an XT FC-M752
splined BB set-up on my full rigid MTB. I've noticed no
real difference in shifting performance compared to full 8
speed setups. I'm also using a 9 speed front derailleur on
the hardtail with no fuss.

The only real problem I have is with my splined XT crank/BB
setup. It developed an intermittent clicking noise soon
after I installed it last year that I just can't get rid of
no matter what I do. All the trouble-shooting I've done
(including wapping parts around from bike to bike and
replacing the BB) has points directly at the splined
BB/crank interface. No amount of cleaning, tightening or
greasing gets rid of it permanently.

KLydesdale wrote:
> I'm running 9 speed cranksets with 8 speed chains,
> cassettes and shifters on two MTBs right now - an XT FC-
> M760 w/ the integrated BB on my hardtail and an XT FC-M752
> splined BB set-up on my full rigid MTB. I've noticed no
> real difference in shifting performance compared to full 8
> speed setups. I'm also using a 9 speed front derailleur on
> the hardtail with no fuss.
>
> The only real problem I have is with my splined XT
> crank/BB setup. It developed an intermittent clicking
> noise soon after I installed it last year that I just
> can't get rid of no matter what I do. All the trouble-
> shooting I've done (including wapping parts around from
> bike to bike and replacing the BB) has points directly at
> the splined BB/crank interface. No amount of cleaning,
> tightening or greasing gets rid of it permanently.

Check the Powerlink (if applicable) on your chain (sporadic
due to gear combos)???

Bill "tick...tick...tick..." S.

Yes as long as you get the same BB in mm.

MTB Ride hard die free.

"S o r n i" <sorni@bite-me.san.rr.com> wrote in message
news:WLWGc.21912$ju5.1646@twister.socal.rr.com...
> KLydesdale wrote:
> > I'm running 9 speed cranksets with 8 speed chains,
> > cassettes and shifters on two MTBs right now - an XT FC-
> > M760 w/ the integrated BB on my hardtail and an XT FC-
> > M752 splined BB set-up on my full rigid MTB. I've
> > noticed no real difference in shifting performance
> > compared to full 8 speed setups. I'm also using a 9
> > speed front derailleur on the hardtail with no fuss.
> >
> > The only real problem I have is with my splined XT
> > crank/BB setup. It developed an intermittent clicking
> > noise soon after I installed it last year that I just
> > can't get rid of no matter what I do. All the trouble-
> > shooting I've done (including wapping parts around from
> > bike to bike and replacing the BB) has points directly
> > at the splined BB/crank interface. No amount of
> > cleaning, tightening or greasing gets rid of it
> > permanently.
>
> Check the Powerlink (if applicable) on your chain
> (sporadic due to gear combos)???
>
> Bill "tick...tick...tick..." S.
>
>

By intermittent I meant that the noise may occur for a
period of time and then not occur at all on the next ride.
When the clicking starts it happens on every crank
revolution which kinda leaves out chain-related stuff.

"KLydesdale" <klydesdale001@comcast.net> wrote in message news:<F-ydnaORmsJUq3HdRVn-sA@comcast.com>...
>... The only real problem I have is with my splined XT
>crank/BB setup. It developed an intermittent clicking noise
>soon after I installed it last year that I just can't get
>rid of no matter what I do. ...

Loose pedal bearings sometimes sound like BB noise.

Lewis