I read article after article and have buddies that went Dark... I just put on a Kumho RunFlat C/T on the rear of the Wing and put a Battalax BT-45 sport bike tire on the front (just a bit more rubber on the road). So I actually went Double Dark as they say... The Wing rides super smooth (of course I have whell balancers but will you Dyno Beads on the X), took a couple of short runs to get used to the feel in the curves and the quicker stand-up coming out; but since riding about 5 times now...I don't really feel a difference, except that I have more confidence up-front. I will definitely go Dark on the X when the Metzlers run-out of tread. Go for it, just do the research on the tires that others have had success with on the VTX, that is what I did for the tires on the Wing.