If you are referring to Continental GP4000, they have been replaced by GP5000. The only reason I mention that is that Continental has reduced the measured size of the GP5000 compared to the older GP4000 to reflect the size when mounted on modern wider rims.

Rim width does effect actual inflated tire dimensions so it isn’t as cut and dry. Times have changed from the old 14mm internal width road rims.

If you go to rollingresistance.com you can get measured sizes.

John