5'7'' obiviously have no prob
but with the afrtermarket seets if you make your own brackets
you can drop the seat hight about 1.5''
but rember the seat is your friend make shure its safe <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/crazy.gif" border="0" valign="absmiddle" alt=':crazy:'>