2-speed front derailleur - three possible positions? I have Shimano 105 7000 groupset on my bike. 2x11. For some reason I have 3-rd in-between click on my front derailleur. To get into that 3-rd position I need to shift into large chainring and then apply reduced pressure on FD lever. Amount of force should be just below chainring change threshold. If I do that - I get a smaller click and FD moves ever so slightly towards the smaller cog. If I don't do that - when I'm on bigger sprockets the chain rubs a bit and shifting RD becomes much more stubborn.
The question: is this by design? Seems strange but understandable. If so, what are some pros and cons of this?
That's the high &quot;trim&quot; position.
Most Shimano front road derailleurs have four positions: low, low trim, high, and high trim.
If your derailleur is properly adjusted, after you shift the front derailleur to the low-gear position, it will have a position somewhat outboard that can be reached by pushing the brake lever somewhere between 1/4 and 1/2 the way to full shift.
And as you've discovered, there's a &quot;high trim&quot; position that can be reached by applying light pressure to the small shift lever to move the derailleur slightly inboard from its &quot;high&quot; big-gear position.
Those two &quot;trim&quot; positions allow cross-chaining capability without the chain rubbing on the front derailleur cage.