The SwimGym pool has a (racing) bike parking available for members who do not want to park their bike outside. You can purchase a bike parking membership for 5 euros per month (one-time deposit required of €15, -). You will then receive an access pass for the bicycle parking.
To park the bike, you must bring your own padlock. You can only park your bike at the designated SwimGym parking racks. Also, the bicycle can be stored for a maximum of 2 hours at a time.