i ride a 57cm and im about 5'11. i have quite a long torso (i think?), so i need a 57cm Top tube.
o used to ride 54cm top tubes way back in the day... thats also when i used to get lower back pains :/! i rode 54cm cause the standover height was perfect. the 57 S.O. height is bit taller but one foot always stays on the pedals or they dont come off at all (road) or im trackstanding/leaning up against a pole