I have a french bike which has odd ball size seat post and quill so it is not easy for me to just substitute parts and see how things work. So this is my question. What will going from a 57 cm frame to a 59 cm frame do for me? My seat needs to be moved back by about 4 cm more than it will presently go. My handle bar needs to be raised by about 4 cm minimum. Will a 59 cm frame allow me to do this? I am asking this question because I am planning on getting another bike which will not have the old odd ball size parts so that I can substitute parts as needed. I am thinking that just a larger frame will not correct the fit like I want.