Originally Posted by giro_man

I agree with dsaul. You were told that the setback is 3.25 inches. The question then is what reference points did the fitter use. For myself, I measure setback from the centre of the bottom bracket to the nose of the saddle. If you measure setback from one bike to another or from one size to another, the only constant and assumption is that you are using the same saddle. Differing frame angles make no difference. If you are using a different saddle from one bike to another, setback may need to be adjusted to take into account the length of the saddle and in particular where on the saddle are you sitting. Different shapes of saddles can have you sitting more forward or more rearward. When I changed my saddle to a noseless saddle, I had to adjust setback. What is important is to understand what the fitter was measuring and then trying to duplicate that measurement.