Hi All, sorry to post again. On the spec sheet for the Pocket Rocket Pro that i Just listed, it says the Effective top tube length is a 58cm, but I don't think that is correct. I just measured from where a "normal" top tube would meet parallel to the ground and to the middle of the seat tube, and that is 54cm. that would make sense because it fits me just right, and that is the measurement from which I had BF build it, which came from my 54cm Cervelo road bike. It should fit someone between 5-5 o 5-10 or so. thanks. Kenny L