Ratio of the core-to-surface rotation rate as a function of gravity for models that include magnetic braking of the stellar surface (with a solar-calibrated value for the braking constant). Black, blue, and red continuous lines correspond to an initial velocity on the ZAMS of 50 km s^-1 and an additional viscosity of 3 × 10⁴, 1 × 10⁴, and 4 × 10³ cm² s^-1, respectively. The green line corresponds to a similar model with an initial velocity on the ZAMS of 10 km s^-1 and ν_add = 4 × 10³ cm² s^-1. The dotted blue line corresponds to a model without surface magnetic braking, with ν_add = 1 × 10⁴ cm² s^-1 and an initial velocity on the ZAMS of 8 km s^-1. Red dashed vertical lines indicate the values of the gravity of KIC 7341231, while the blue region indicates the lower limit of the core-to-surface rotation rate determined for KIC 7341231.