I am a bike designer/ frame builder and am 5'- 6" tall, after examining the geometry On the kilo tt the cranks are elevated (high bottom bracket) over eleven inches, (half an inch above normal) so when they say 50 cm it puts the seat tube that much higher. I do not know what top tube/ foot overlap you can stand, but if you go to the 47cm, for me the 51cm top tube and 38 mm fork offset with a 73 degree head tube, spells a huge amount of foot overlap and short reach. In a perfect world, I would believe you would be happier with a 46 - 7 cm seat tube 10.5" bb height, a 53 top tube and a 72 head tube angle. In other words their geometry sucks.