Originally Posted by
okane
...50cm would have been 19.6" frame (I never got metrasized) and would have been for shorter riders, say 5'6" or below and I can't imagine it being comfortable for a 6 footer! I'm 6' and ride a 23" frame (58.4 cm) comfortably.
Today, however there are many different styles of frames and the "old system" of measuring is no longer applicable in many cases.
What's more important is how the fit feels to you. I want my knee to be slightly bent at the bottom of the "stroke" (and not hitting the bar at the top), otherwise my knees get very painful in short order.
Maybe, maybe not.
I HATE the concept of using the seat tube length as the primary sizing guide. It's really stupid!
First of all, saddle height is the easiest adjustment to make on a bicycle. Worrying about seat tube length is like fretting over the neck dimension of an open collar shirt.
Second is today's popularity with sloping top tubes. The actual seat tube length means NOTHING if you're trying to compare one brand of bike with another.
Since you feel the bike seems to fit and is comfortable to ride, I'd just go with it.