Reykjavík has many dedicated bicycle paths. For example there is a bicycle path around the Reykjavik peninsula. This is a lovely way to orientate yourself when you first visit the city, or for an enjoyable outdoor experience with modest exercise.
Reykjavik Bike Tours and Rentals offers city bikes, mountain bikes, ebikes, gravel bikes, tandems and trailers and children’s bikes for rent. Use a free map from them for navigation.
Reykjavik Bike Tours and Rentals is located in Reykjavik’s Old Harbor close to the Old city center of Reykjavik.