Would add my 2p worth. I would say the standard way of measuring was always centre-to-centre for both seat-tube and top-tube in inches.
No such concept of standover height, effective top-tube, forward reach etc. If you can, try to ascertain the angles to help. The market is mixed with older production bikes and many custom made bikes using dark art that may have been tweaked a little for the rider / for the purpose.
No such concept of standover height, effective top-tube, forward reach etc. If you can, try to ascertain the angles to help. The market is mixed with older production bikes and many custom made bikes using dark art that may have been tweaked a little for the rider / for the purpose.