Using tire data sets for the Flexible Belt model (FB) you have the possibility to change from a linear equidistant lookup table concerning the velocity direction to a equidistant logarithmic by a click to the check box in the Friction3D-Box from the FlexView GUI. The area of the lookup table takes also the entered MaxVelocity value into account. So you have the possibility to have a certain mue value for sticking, a different mue value for small sliding velocities up to large sliding velocities, which may be controlled by the mentioned MayVelocity value.
FlexView: Box: ContactBox/Button Friction3DEditor/CheckBox LogXAxis and TextBox MaxVelocity.