The 58 might not be too big. Your inseam should be measured by standing stocking footed with your feet about 8" apart. Then take a book and plant it firmly between your legs as high as it will go up against the pubic bone. Then measure the height of the top of the book from the floor. Do this several times and take the average measurement. I suspect your cycling inseam is more than 32". Also, if this is your first drop bar bike, you're probably going to feel a but stretched out at first, At least I did. A shorter stem made a world of difference. I'm 6' with a 34.25" PBH (pubic bone height). I'm riding a 58 with a 80mm stem and could be fit to a 56 as well. This is on a touring bike which has a longer top tube, so the 58 with a shorter stem might be just right for you.