Re:
Sorry, I didnt know how to pitch it, I wasnt meaning to be patronising, hope you read it in the spirit it was intended. Its not always easy to know who knows what.
Anyway, back to your dilema.
As a (very) rough guide, horizontal frames are built square, that is seat and top tubes are built to the same lengths. So, if you are looking for something with a 535mm top tube, I would expect your frame to be 53-54 cm. It can vary a bit, eg Colnagos are bit short in the top tube and some of mass produced raleighs of old are a bit longer. I wouldnt expect a 50-52cm frame to have a 55 top tube. Maybe that was a custom special that the customer wanted like that
Sorry, I didnt know how to pitch it, I wasnt meaning to be patronising, hope you read it in the spirit it was intended. Its not always easy to know who knows what.
Anyway, back to your dilema.
As a (very) rough guide, horizontal frames are built square, that is seat and top tubes are built to the same lengths. So, if you are looking for something with a 535mm top tube, I would expect your frame to be 53-54 cm. It can vary a bit, eg Colnagos are bit short in the top tube and some of mass produced raleighs of old are a bit longer. I wouldnt expect a 50-52cm frame to have a 55 top tube. Maybe that was a custom special that the customer wanted like that