Fiducial dynamical model for the galaxies. We show the measured circular speed, i.e. the rotation curve corrected for pressure support, as the blue shaded region. We also show the circular speed predicted by our model in black. The circular speed of the different mass components in the galaxies are shown as different shaded regions: stellar component (dash-dot line, orange), gas disc (dashed line, pink) and NFW CDM halo (dotted line, blue). In the case of BRI1335−0417, we fix the CDM halo to the cosmological baryon fraction. As explained in the main text, due to difficulties in breaking the degeneracy of the gas and DM contribution to the rotation curve we keep the CDM halo fixed to provide an upper limit on the baryon components.