front derailleur; necessary?
I commute on a Specialized ATB in nasty, salty, sandy, slushy
Boston winters. To minimize cleaning time I decided to remove the front derailleur since I only ever used the middle chainring anyway. Who needs 27 gears for commuting? The problem is now my chain autoshifts in front or falls off entirely (in either direction).
Not too often, but often enough to be annoying.
Is this because my chain is too long? Or is part of the derailleur
function to keep the chain on?