Bear in mind that most electric motors can be used to provide a braking action as well as traction,
Either as a resistive brake i.e. motor used as a generator and power disapated in resistors, though not practical on an a/c through weight,
Or regenerative braking where the generated power is returned to the supply bus, this could work from touch down so it would not remove the braking action from the nose wheels.
As a last ditch an electric motor can go from forward to reverse, again to provide braking action.