Nedre Slottsgate 4J, 0157 Oslo, Norway | Bike tours and rentals depart from our shop at Nedre Slottsgate 4J, in the heart of downtown Oslo. Located between the main shopping street of Karl Johans Gate and the old fortress Akershus Festning, the shop is 5-10 minutes on foot from the central train station, the city hall, and most major hotels.