Shimano front derailleur clearance
I run Shimano 2 X 11 drivetrain with 38c slicks on my Niner. Today I threw on some 40c tires with a slight knobby pattern and was surprised to see how close the front derailleur was to the tire when shifted into the big ring (about 2mm). I run a Shimano Tiagra front derailleur and was wondering if there is a clamp on style front derailleur that would provide more clearance. I was thinking GRX but that probably has a different pull ratio. I would love to have a 42c knobby on the rear on some occasions but it will not work with this front derailleur.