• Shifter is a old RS685 + a GRX 810 front mech. Supposedly I could've got away with using the 105 front mech we had but didn't want the hassle.

    I thought the crankset + front mech had to be grx, the rest didn't matter?

  • Yep, so you need the grx front mech. Shifter doesn't matter.

  • As with all things stated Shimano compatibility, take it with a pinch of salt. I’d imagine regular road FD’s have enough throw and adjustment to easily accommodate a +2.5mm chainline

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