Your math is correct. I was going by their quote to me when I interviewed them. Some days they rode only a few kilometers, due to terrain, illness, injury or mechanical malfunction. On other days they said they usually maintained 120km for a daily average. From what I understood, they rode everyday, taking no rest days, as the terms of the crossing and to actually make it fast they needed to ride every day, but some days they likely would only do 10-20km before stopping for the day.