Originally Posted by
vuduthmb
I was kind of going by stand over height and looking to see if my leg was fully extended on the pedals.
Charts are guesses based on "average" proportions. Since literally no one is actually average in every dimension, those guesses are going to be worse for some and better for others. I'd go with your sense of how the bike feels over a chart every time.
I'm confused by the language I quoted above--you do know that you don't want your legs "fully extended" at the bottom of your pedal stroke, right? I'm not being a smart aleck, I just wouldn't want you to mess up your knees by hyperextending them repeatedly.