Originally Posted by
Emilio700
With the 40c Pirelli Gravel H on 22mm internal rims, 46T outer, about 5mm clearance to R9100 FD. Chainring size plays a small role in clearance. As you reduce chainring size, the derailleur drops and moves away from the tire. So if you are running a sub compact 50t, your clearance might be a bit reduced from what I have.
For sure, rim width is also a factor here. It's close with Di2, but it works. I don't have any experience with etap but looking at their form factor, they could also be a bit tight . Safe to say that it is a non-issue with a mechanical FD.
Makes good sense...appreciate the help. I'm going to apply some helicopter tape to the back of the FD body to protect from superficial damage. Already had the entire frame coated with protective film. Not too worried about the FD body, but may as well have the tape there in order to gauge susceptibility on first few rides.