The infamous cycle tan
These are the legs of a bunch of shameless hussies; showing off their knees like this, tsk.
But yes, a cycling tan is usually this crisp and even (though the snow lay round about, la la la). The only way to avoid this is to only cycle by moonlight, or wear a full-sleeve, full-leg cycle-suit.
Like this one
Oh Jesus help me.
Better the cycle-tan methinks.