It looks like you used the Competitive Cyclist fit calculator? It showed I needed a 53.1-53.5 top tube with an Eddy fit. I'm 5'10" and have had everything from a 54-58. My 57 with a 90mm stem (ST is 54c-c, 58c-t and a slack seat tube angle) is the best fitting bike I've ever had. No way would I go shorter than 54.