Read a review when I was first considering a SuMo where the tester was 5' 8" w 30" inseam and he said that while it's a stretch when stopped it's pretty perfect when riding.
YMMV
I sat on it plenty of times. Great riding position. Just had to be completely off the bike to get my tippy toes down on one foot.
Remember Yesterday. Plan For Tomorrow. Live For Today.
Current Stable:
'o5 SuzukiGSX-1oooR (Custom Street Fighter). 'o6 Pitster Pro 50cc Pit Bike (125cc Big Bore Kit).