If your thinking of going 1x you may be able to to fit a SRAM MTB derailleur , when I had SRAM on my old CX bike I remember reading that the 10 speed groupsets had the same pull ratios ( or something like that) for the road and MTB rear derailleurs. Not sure if that's the same for the 11 speed groupsets.
The SRAM road rear derailleurs also are set at higher tension than shimano so if you get the chain length right 1x should be ok with a normal rear derailleur . Until I killed my old ultegra mech with some crappy after market shiny pimp my ride cogs that promptly broke I never had an issue running it 1x . In fact Giant supplied it like that way before GRX was a thing
If your thinking of going 1x you may be able to to fit a SRAM MTB derailleur , when I had SRAM on my old CX bike I remember reading that the 10 speed groupsets had the same pull ratios ( or something like that) for the road and MTB rear derailleurs. Not sure if that's the same for the 11 speed groupsets.
The SRAM road rear derailleurs also are set at higher tension than shimano so if you get the chain length right 1x should be ok with a normal rear derailleur . Until I killed my old ultegra mech with some crappy after market shiny pimp my ride cogs that promptly broke I never had an issue running it 1x . In fact Giant supplied it like that way before GRX was a thing