they do make a locking system.
you can purchase the deadlock system, which locks the rack to the hitch, and also the bikes to the rack,
or.......
you can purchase just the hitchlock, which will lock on to the back of that bolt that comes through the rack.
you can purchase the deadlock system, which locks the rack to the hitch, and also the bikes to the rack,
or.......
you can purchase just the hitchlock, which will lock on to the back of that bolt that comes through the rack.