Ortlieb Rack Three Rear Mount Bike Rack – Black. The ultimate bike rack! The ORTLIEB Rack Three offers you the right solution whether youre on your way to work the grocery store or around the world. One unique advantage of this all-purpose bike rack is its compatibility with all ORTLIEB attachment systems. Outfitted with convenient mounting elements for the QL3 and QL3.1 systems the Rack Three allows you to attach all ORTLIEB bags directly to your bike without any other modifications. If you want to use the Rack Three exclusively for your QL2.1/2/1 bags you can easily remove the attachment elements for the QL3.1/QL3 and thereby create even more space for your panniers.The Rack Threes double-rail design allows you to attach all bike bags with a QL2.1 QL2 or QL1 system to a top level or a lower level. Selecting the lower level gives you the option of simultaneously attaching a bike basket or a Trunk-Bag to the top of your bike rack and expanding your overall stowage space.