Bill wrote:
"Qui si parla Campagnolo" wrote in message
oups.com...

Kyle.B.H. wrote:

I'm having problems (again) shifting from my middle to granny under
load. I just replaced my moderately worn 40t middle with a new 38t,

and

the problem crept up again. I have already taken the measures of

filing

away the portion of the derailer that conatcts the frame, filing a

small

groove in the seat tube itself, and even moving my chainline outward
about a mm via a BB spacer, and still no success. It shifts fine

when

not under load, but once you start up an incline, forget it, it won't

go. Its an Ultegra der. and TA Alize rings.

So now I'm thinking I'll file the tops off of two consectutive teeth

in

the middle ring to aid the shift. Don't some chainrings include this

as

a feature?

A) Think this will help?

B) If I do this, where on the ring (relative to the right crankarm)
would I file the teeth?

C) Any other suggestions?

Thanks,

Kyle

Perhaps the 6603 front der which is designed for a 39t middle ring,
with the appropriate ramps to get the chain to the granny.


I was under the impression that shifting the front "under load" wasn't a
plan.
Bill

unfortunately, the need for the granny gear most often coincides with
the drivetrain being under at least some load, i.e. you're going up hill.