Did a trip from Osnabrück to Kassel once, with a normal bike. Long time, many years ago, due to invitation by friends of friends of mine. A horrible agony. We had kids with us.
It is around 160 km or so, I think even more, but due to the kids it took us 14 hours or so. And at the end the mountains around Kassel, the loooong climb... I was more dead than alive, and I was "
entnervt" beyond imagination. The way back I took by trains, my knees both were sore/inflammatory. Missed the first train jump, and the next time I had to switch trains again I learned that the trainw ould not come due to a breakdown. All that with the loaded bike, and hurting knees. That weekend was a nightmare.
Never mention Kassel again.