I've got an Easton crankset. If your goal is to change your setup in front, that might be a good option. They've got 2x gravel rings that they sell as a single unit—I've got the 46/30 but they have others—and they sell a spider for mounting typical road rings. You'd still need to remove the crank from the BB to make the swap, and adjust the front derailleur's height. Praxis does something similar, although their gearing only goes down to 48/32.
Another interesting option might be White Industries. They sell 2x chainring combos (for their cranks) that are more widely spaced than you typically see, and claim you can have differences of as much as 22 teeth, which would allow for, say, a 50/28 in front. That would give you loads of range without needing to swap anything, although unless you have a mega-range rear derailleur, you'll need to be careful about cross-chaining. With an 11-30 in back, you'd need something like a Deore Long Cage to have enough wrap capacity.
Last edited by adamrice; 01-02-22 at 02:51 PM.