Global SFR as a function of global stellar mass for our sample galaxies from the PHANGS-ALMA sample. Solid and dashed black lines denote the main sequence of star-forming galaxies with a scatter of 0.36 dex, as given by Leroy et al. (2019). The PHANGS galaxies with central rings are color coded by the central ring gas mass as obtained in this study and the different symbols denote barred spiral (diamond) and unbarred spiral (open diamond) galaxies, barred early-type galaxies (ETGs, cross), and unbarred ETGs (open cross). The MW is plotted as a black dot with red errorbars.