I am also 6'2" tall. My Orbea Onix is a 60 CM and fits very well. My Trek 5500 is a 60 CM and fits very well. My Surly LHT is a 58 and fits very well. I have not got a clue either.

I need to add that I had a Specialized Allez (sp) 61 CM that I bought used that was too big for me. The next bike I had was a Tirreno Razza 2000 which was a 58 CM and was too small. Finally went to a LBS to buy a new bike that fit. Best move I have make in cycling.