for 6'2" and Irish (which is what I am.. McDermott) id say 23" is about the smallest you want to go. depends on how you plan to ride it... i tend to go for smaller bikes for my commute which involves quicker 3 mile shots - some through traffic where I have to be nimble - interrupted by stairs and train rides. if you plan on longer rides then a larger bike can be more comfortable and id think you really want a 24" as a sweet spot - with a 25" not a problem either.