Core (full line) and surface (dashed-line) rotation rates for 1.0 (light grey), 1.1 (medium grey), and 1.2 (dark grey) M_⊙ models. Different sets of coefficients for the extra-viscosity ν_add(t) are explored in each panel: top-left panel: ν₀ = 2.5 × 10⁴/α = 0.5, top-right panel: ν₀ = 2/α = 3.0, bottom-left panel: ν₀ = 2.5 × 10²/α = 1.5, and bottom-right panel: ν₀ = 7.5 × 10²/α = 1.5. A, C, and H SGB stars, and KIC 4448777 are indicated with the same colour code as in previous figures. RGB stars from Gehan et al. (2018) are colour-coded as the models predictions according to their determined seismic mass.