I am currently building a gravel bike from a road bike, however, the rear frame is so narrow, I dont think I can run over a 28 tire.
So, now I am considering switching over to a used frame of some sort with a wider space between the rear triangles. Something decent, not too heavy, prefer steel, old is fine as long as I can run a wider tire. 35 at least, but maybe up to 45 width. Thanks