The proven trunk for your bike is now also available with the newly developed ortlieb rack lock system with four adjustable hooks on its underside the trunk bag can be conveniently mounted to virtually all commercially available bike racks secure it with a key and then quickly remove it again whenever you like no further adapters are necessary with the rack lock system the waterproof rear bag also has a range of advanced and proven features robust rip stop nylon fabric waterproof tizip zi