I just bought a 57mm Litespeed online. Top tube = 56.5. I am 5'11" with a 34 in inseam. The kit came with a 100mm stem. The bike just arrived and feels way long. I am going to switch out the 100 mm for a 90 mm stem and see if that helps. If it doesn't, should I drop down to a 55cm which has a smaller top tube? Will I give up anything in terms of confort doing so?