Each to his own! From recumbent bikes to bikes without gears or e-bikes or cargo bikes right up to racing bikes: All kinds of bikes are allowed, even quite ‘unusual’ ones! Around half of the participants use racing bikes, roughly 30% use trekking or mountain bikes and the remainder will be on ‘other bikes’. In 2018, racing bikes will always be riding on paved or at least hard surfaces; for all other bikes, the focus is on ‘experiencing nature and culture’ – the surface may therefore sometimes be forest floor.