Rotational asymmetry between primaries and secondaries, for all wide binaries (left column), and for a subset where at least one component is an increased rotator (right column). Medium wide and very wide binaries are coloured in blue and red, respectively. Top: Ratio of the rotation periods P/S vs. mass ratio; the size of the circles indicates the orbital period, i.e. component separation, on a logarithmic scale. Bottom: Histograms.