We've just checked and we're definitely measuring it correctly. The measurement is from BB to top of the saddle and both our measurements are out by quite a lot.
As an example, her current comfortable riding position is 74cm, yet the fit calculator is recommending around 64cm.
The inseam measurements you entered, did you take those as directed with a level or stiff book hard up against your crotch? You can't just use a trouser inseam.
Yes, we did everything correctly. The only reason why I'm a little puzzled, is that all the other measurements on the calculation page were all within 1-2cm of what was recommended. Its only the BB to saddle measurement which was out by such a large amount.
We've just checked and we're definitely measuring it correctly. The measurement is from BB to top of the saddle and both our measurements are out by quite a lot.
As an example, her current comfortable riding position is 74cm, yet the fit calculator is recommending around 64cm.