Originally Posted by bmike

How wide a bar are you running? On a 42, you *might* have issues, but I can't imagine that will be a problem with the Acorn. IIRC there is only about 2" of throw on the lever. (been a long time since I ran Shimano brifters)

I run 46 CowBell2s on my IF, I can run my bikepacking setup up front without shifting issues (although I recently switched to bar ends for separate reasons). This setup sits higher than most bag / rack combos.

Heres the Acorn on a Marks Rack. Those were 44 (or 46) Nitto bars, with Campy Ergo 10spd shifters.