How does difficulty level work?

[Snowpelt]

I wouldn't use it like adjusting gears on a bike but more of a balance point for your fitness level and the Challenge you want. At difficulty 1 you will move much faster with less pedaling, and at 10 the opposite. Depending on what I am doing I will adjust it, if for example I am trying to get a long ride done in a short time window I will drop it down to 1. Normally I leave it around 5.