P3C Measurements: Are they off?

I took out my tape measure and measured my P3C and the bike seems significantly bigger than what is advertisied. For example, the top tube seems longer that what is published as does the head tube and several other measurements. Anyne else finding similar results?

No, they are not “off”. Cervelo published an intelligently depicted set of dimensions meant to enable a bike fitter of reasonable skill and experience to make use of their geometry charts.

That said, the actual measurements of the frame are different. I am working on a quick little update for our website that includes photos of the different sizes and a table with all the dimensions. I’ll post here when I put it up.

Can you explain what you mean by the difference between “dimensions” and “measurements”? To me they mean the same thing.