Relation between the rotational velocity (as a percentage of the critical rotational velocity) and (1) the shift in zero point (Δa₀) of the SBCR (compared to the static relation) and (2) its dispersion (σ). The horizontal red (resp. blue) dotted lines correspond to the average σ (resp. Δa₀) for the 150 models (see Table 3). All the quantities are derived using the C3 interferometric configuration.