Stephen- I currently ride a Felt F1 (56). I know the specs on my race bike won’t match the TD but the Felt specs seem to fall mostly in-between the 54 and 56. I’m 5’10” but feel I may be more comfortable with a 54 for the TD. Any recommendations you could provide with a frame size for me? I can also provide the specs on my Felt frame if that would help. Thanks!