I'm 5'5" and can totally flat foot on the ST, so I think you'll be fine as long as you're comfortable with with your reach to the ground. Depending on your build, you might find the handlebar a bit of reach and requiring more forward lean than a taller rider. I rotated my handlebar towards me a bit. Though that lowered the grips slightly, the slightly shorter reach was far more comfortable overall. If you feel the reach for you is going to be a bit too much, I'd ask a dealership about different handlebars or possible risers that also reduce reach.