Ratio of core to surface rotation rate as a function of gravity for rotating models of KIC 7341231. Black, red, blue, and green lines correspond to models computed with an additional viscosity of 3 × 10⁴, 2 × 10⁴, 1 × 10⁴, and 3 × 10³ cm² s^-1, and initial velocities on the ZAMS of 20, 15, 8, and 2 km s^-1, respectively. The red dotted line corresponds to a model with an additional viscosity of 2 × 10⁴ cm² s^-1 and an initial velocity on the ZAMS of 10 km s^-1. Red dashed vertical lines indicate the values of the gravity, while the blue region indicates the lower limit of core-to-surface rotation rate determined for KIC 7341231 (Deheuvels et al. 2012).