Top panels: surface density profiles for the H₂ disk (blue circles), HI disk (green upward triangles), stellar disk (yellow downward triangles), and stellar bulge (red diamonds) when necessary. Open circles indicate that the surface density is extrapolated from an exponential fit. Bottom panels: observed rotation curve (dots with ±1σ error bars) is fit with a maximum-disk mass models (black solid line with ±1σ error band). The baryonic rotation curve is decomposed into the contributions of molecular gas (blue dashed line), atomic gas (green dash-dotted line), stellar disk (yellow solid line), and stellar bulge (red dotted line) when necessary. The maximum mass-to-light ratios are given in the top right corner.