Evolution of the equatorial rotational velocity as a function of time for the stellar evolution models calculated by Brott et al. (2011, solid lines) and a 60 M_⊙ track (dashed line) published by Meynet & Maeder (2005). Both studies account for very rapid rotation (v_rot,ini> 500 km s^-1) and an initial metallicity of 0.14 Z_⊙. The labels close to the tracks refer to the initial mass. The color coding is the same as in Figs. 18 and 19 (see also the inlet).