Masses of the galaxy components as a function of the circular velocity v_c. From top to bottom the components are the gas disc, the thin disc, the thick disc, the CMC, the sum of the cold components (gas and thin disc) and the sum of the hot components (thick disc and CMC). Arrows indicate the velocity of galaxies with no Hi data in HyperLeda (first panel) and galaxies with no detected CMC (fourth panel) with the same colour-coding as the other symbols. Filled black dots correspond to gas-rich galaxies, and grey circles correspond to gas-poor galaxies.