If you want to take a bike on the bus, you must register it at least 24 hours in advance. They will then install the bike rack in Tana. Even if you're traveling without a bike, you should register it four hours in advance. +47 75 77 18 88
In my case, it ended up being 48 hours. They probably don't run on Sundays, or the bike rack was occupied. The bus driver was pleased with the wobbly bike rack. It was his first time using it. Men's bikes can be mounted on the crossbar; how they mount women's bikes is a mystery to me. There's room for three bikes.