Projected surface rotation velocity, Vsin(i), as a function of the near-core rotation velocity, Ω_nc. The lines represent our simulations. The line types and colours have the same meanings as in Fig. 1, with the addition of a simulation where the initial rotation velocity is V_ini = 0.3 ⋅ V_crit (red). Colours are used only for the evolutionary stages in which the buoyancy radius remains within the range P₀ = 4092 ± 575 s, which is consistent with the plotted observational data from Li et al. (2020). The surface velocities of our models have been multiplied by π/4 in order to take the unknown distribution of the inclination into consideration.