Originally Posted by forum*rider
hmmm, according to that my bike is too small. I'm 5' 3" with a 28.something inseam. I should ride a 19" correct? My current mtb is 18", and yet it feels fine.
Eh, as long as it works it's good enough for me.
You are fine. I was referring only to road bikes; MTBs tend to run an inch or so smaller with more seat post showing. 48cm. which is just under 19inches, is the smallest size conventional road frame you can build. That is one with a level top tube and 27 inch wheels because at that point the top tube and down tubes merge together.
Originally Posted by Crispin
What about me? I have a 38 inch (=96.7 cm) inseam. My height is 1.89 m. I don't know what that is in foot.
This formula does not work for you because you are 6’ 2 ½” tall but you have exceptionally long legs; 38 inch inside leg. For you I would recommend a 64cm. frame center to top, which is 62cm. measured center to center.