I am very happy with a Marathon Supreme 35 on the front, and a 40 on the rear. The ride and handling is much better with this mix, than any other sizes I tried. (45s front and rear, 45 rear-40 front,40s front and rear, 35s front and rear. This mix gives me a very nice ride, and VERY nice handling. Wet or dry - makes no difference.

If you are not taking it to the mud, what's the reason for the fatter tire on the front of your bike?

No kidding - my combo is very nice for my 190# bulk.