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

[Daniel Kelly \]

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

 

[Werehatrack]

On Wed, 7 Jul 2004 14:29:42 +0100, "Daniel Kelly \(AKA Jack\)"
<[email protected]> 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.

 

[Mark Hickey]

"Daniel Kelly \(AKA Jack\)" <[email protected]> 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

 

[Daniel Kelly \]

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" <[email protected]> wrote in message
news:[email protected]...
> "Daniel Kelly \(AKA Jack\)"
> <[email protected]> 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

 

[Klydesdale]

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.

 

[S O R N I]

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.

 

[Fred Hinkson]

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

MTB Ride hard die free.

 

[Klydesdale]

"S o r n i" <[email protected]> wrote in message
news:[email protected]...
> 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.

 

[Lewis Metzger]

"KLydesdale" <[email protected]> wrote in message news:<[email protected]>...
>... 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