I recently bought a new bike with a Shimano Tiagra front derailleur and am
still confused about how the "trim" feature works. Sometimes it appears to
be active, other times not. Appears to work only on the large chainring, and
not in all gears. Can anyone explain how more precisely this is supposed to
work?

It is a nice feature.

"mark watkins" wrote in message
m...
I keep reading about the "trimming ability" benefit of Tiagra and
above front derailers. Could someone explain to me in detail what this
trim ability is, and if it is something that I will be using on my new
2004 Cannondale R600 Triple?