9 speed chain on a 10 speed crank

[RS]

My FSA Energy ISIS compact crank is getting a bit worn, thinking of
replacing with a Shimano compact crank (R700, Ultergra or Ultegra SL)
but I'm running a 9 speed DA7700 setup. Will the chain be too wide for
the 10-speed chain rings? If so what's the fix? I suppose I could run a
10-speed chain but would prefer to stay with the 9. Space the rings out?

thanks to all

[Paul M. Hobson]

RS wrote:
> My FSA Energy ISIS compact crank is getting a bit worn, thinking of
> replacing with a Shimano compact crank (R700, Ultergra or Ultegra SL)
> but I'm running a 9 speed DA7700 setup. Will the chain be too wide for
> the 10-speed chain rings? If so what's the fix? I suppose I could run a
> 10-speed chain but would prefer to stay with the 9. Space the rings out?

Shouldn't have any problems. Go for it.

--
Paul M. Hobson
..:change the f to ph to reply:.

[Hank]

On Mar 27, 11:04 pm, "Paul M. Hobson" <fob...@gatech.edu> wrote:
> RS wrote:
> > My FSA Energy ISIS compact crank is getting a bit worn, thinking of
> > replacing with a Shimano compact crank (R700, Ultergra or Ultegra SL)
> > but I'm running a 9 speed DA7700 setup. Will the chain be too wide for
> > the 10-speed chain rings? If so what's the fix? I suppose I could run a
> > 10-speed chain but would prefer to stay with the 9. Space the rings out?
>
> Shouldn't have any problems. Go for it.
>
> --
> Paul M. Hobson
> .:change the f to ph to reply:.

The tooth width is the same, IIRC. Main difference is the inside face
of the big ring is actually thicker on the 10-speed ring, to guide the
chain down to the smaller one and prevent the chain from skating
between rings.