That chart looks a little off to me. For example, Bontrager (Trek) released the Aeolus Pro 3V which is aimed at the "high volume road and gravel tire" market (not MTB) and it's a 25mm internal width. If that chart is accurate it says 44c-57c...but most gravel frames max out around 45c or 50c for 700c tires. I just chatted with Trek CSR (because seeing that chart made me nervous since I just bought the 3V) and their official tire size support for the 3V is 32c - 64c.