To rent a Styr & Ställ bike you need to register. This is easily done through the Nextbike app (available on App Store and Google Play), at styrochstall.se/en, by calling customer service or by visiting one of the rental bike stations around Gothenburg.
There are three different options:
• 1-year card 300 SEK
• Monthly pass 90 SEK
• Single-ride pass 20 SEK
Read more about the rental bike system here.