Just getting started bicycling. Trying to decide between 56 and 58 cm road bike. I'm 5'10" but with long inseams. I'm aware of many internet sites toget proper bike size and most conclude getting a 56 cm. Trouble is, that leaves 5.25 " of seat tube sticking out. It looks excessive and I just haven't seen that much on other cyclists. What is normal or excessive? Thanks, Joe