monTEK Bike Wall Mount for 4.5" Tire Width, Swivel Bike Wall Hanger Holds Up to 77lbs, Space-Saving Bike Rack Garage, Heavy Duty Bike Storage for Bedroom Home Office, 2 Pack

Gotcha. Im not sure how much space it will actually save putting it on the wall. Seems like kind of a silly request by the super but I understand you have no control over that. Perhaps something like this which hangs vertically, similar to what another user recommended but it swivels towards the wall to take up less space: https://a.co/d/0hVmQ8jS