Originally Posted by europa

Wot's an FFS?

Yeah, I know, I'll kick myself when you tell me but at the moment, all I can think of is For Fooks Sake which, while appropriate for Shimano, probably isn't the correct answer.

Originally Posted by Steev

Front Freewheel System. A Shimano dud. The idea was that the freewheel mechanism was in the crank so that the chain was always moving and gears could be shifted while coasting.