well if you look at the measurements of iro 53cm:
http://www.irofixedgear.com/index.asp?PageAction=VIEWPROD&ProdID=6and of kilo tt 50cm
http://www.cyclesmercier.com/geometry_tt.htmlthey are pretty close...the top tube lengths are only 5 mm different, and i hear thats the most important measurement
standover in the kilo is 29.84" and the iro is 30"
i dont know if that is that much of a difference but i could be wrong
from what i understand iro's are sized a little weird
anyway im about 5'6"