maybe he's built like me, i mean i'm 6ft but i have a shorter 32.5" inseam so i ride smaller 55/56cm bikes,
but i also have some 57/58cm bikes and the seat is a little lower on them, anyways, whatever makes you
more comfortable do it, but over time, you'll want to either find a better fitting bike or like everyone said
here, raise the seat a little higher to improve your leg-extension to maximize your pedal strokes/power.
whatever the case, come out and ride with us and have fun on bikes, ok?