front chainring differential affects derailleur?

To force myself to keep the gears low while
at the same time not wanting to cross gears,
I put a 42 tooth chainring as my big chainring.
So my setup is a 39-42....ya it looks pretty silly.

The problem is the front derailleur will not shift up
when I put the chain on the 39, nor shift down
when it's on the 42.
I didn't change anything with the front derailleur
and it worked fine for a 53-39 setup.

So it looks like the front derailleur just isn't designed
for something like this, eh?

-David

On Mon, 15 Sep 2003 22:58:02 -0700, "David Bruno"
wrote:

To force myself to keep the gears low while
at the same time not wanting to cross gears,
I put a 42 tooth chainring as my big chainring.
So my setup is a 39-42....ya it looks pretty silly.

The problem is the front derailleur will not shift up
when I put the chain on the 39, nor shift down
when it's on the 42.
I didn't change anything with the front derailleur
and it worked fine for a 53-39 setup.

So it looks like the front derailleur just isn't designed
for something like this, eh?


You did slide the FDer down when you did this, didnt you?