FWIW:
Bud and I were ready to order E3s for our '07&'06 Ultras. Was going with the same size MT90B on the front and MU90B on the rear. Factory uses MU85B D402s on the rear, and I called Dunlop Tech Support to see if the published specs were accurate for the E3s since they were within "hundreths" of an inch vs the D402s.
Well, I got a real a$$hole on the phone from Dunlop, and he very rudely stated the E3s were not recommended for the late Ultras; especially the rear since it was an MU90 and the stock size is MU85.
I understand there's always the liability issue; but,
IMO, his attitude and reasoning were total BS!!!!!
So we have a set of the new Michelins coming for both bikes first of next week and unless I'm forced to I will never buy another Dunlop tire!
Of course, YMMV.