From the Roth site, the 2023 bike course is 178km per gpx, btw, so >1% short.
But nearly 1400m of climb (and RwGPS always underestimates the climb (or at least others suggest more)).
Also (from the gpx, the run is 41.8km: 400m short.
https://www.challenge-roth.com/en/course-info.html

Every little helps when you're staging a race where records are made and broken.