I've been using my Giant TCX Pro bike for CX and Gravel races and although 1x is perfect for CX, is not as great for Gravel Racing. I've been thinking of upgrading it to 2x, most likely Shimano GRX Di2 or SRAM Force AXS.

One concern that comes to mind is what will be my tire clearance once I add a front derailleur. I read somewhere that with the Force derailleur, tire clearance would be reduced to 40mm max.

I assume that would also impact using larger 650B tires...

does anyone have a TCX set up 2x using 700c and 650B tires? What's the max tires you guys can use?

Thanks in advance,