How are bikes measured?

[aj1152]

I have a friend--honestly, it's not me--who's looking into these bikes: www.leaderbikestore.com/pd_ld_780r.cfm. He's about 6'4", maybe 6'5". Is the "B" measurement in their diagram the "normal way" of measuring bikes or is it usually the "A" measurement?



Thanks,

Alan

[Wrench Goode]

B is what 95% of the bike industry uses for seat tube length. A is used as a reference to stand over height.

[aj1152]

Thank you!