Ratio of core to surface rotation rates as a function of gravity for rotating models of the six subgiants. These models are computed without additional viscosity (ν_add = 0) and an initial velocity on the ZAMS of 6, 5, 5, 6, 8 and 4 km s⁻¹ for stars A, B, C, D, E and F, respectively. Dots indicate the values of the ratio of core to surface rotation rates determined for the six subgiants from asteroseismic measurements (Deheuvels et al. 2014).