The thule easyfold xt 3 bike carrier comes fully pre assembled so no additional tools are required for security the thule easyfold xt 3 bike carrier locks the bikes to the rack and also the rack to the car easy to handle store and mount the thule easyfold xt 3 bike carrier is fully foldable and has a high load capacity enabling transport of e bikes and heavy mountain bikes the thule easyfold xt 3 bike carrier uses detachable bike arms with lockable thule acutight torque limit