Originally Posted by mmmdonuts

This is the measurement you want to compare between bikes/frames. Road bikes usually call for a different fit than hybrids but it is easier to extrapolate that based on stack and reach than advertised frame size or seat tube length.



Edit: I read that you were worried about the seat tube length and seatpost extension. That could limit your bike options. Crank length can also affect that if the difference is big enough. Sounds like compact geo frames could be a problem for you.