controller of an electric powered trailer connected to the electric bicycle is instructed to adjust a second motor to substantially achieve the target speed application_number US 201514704132 A description fig1 is a block diagram of an exemplary towing system 100 for an ebike 105 the ebike 105 generally includes a motor controller 106 that is included in or communicatively coupled to an electric motor 107 an e trailer 110 similarly includes a motor controller 111 included in or communicable coupled to an electric motor 112 the ebike 105 and e trailer 110 may be coupled by a mechanical towing connection 115 such as is known e g a towbar cable etc further a communications link 120 may be provided between the ebike 105 and the e trailer 110 for example a wire harness or the like such as is known may be provided to provide instruction actuation etc of components of the e trailer 110 from the ebike 105 e g lights turn signals etc further the link 120 may include other wired and or wireless mechanisms e g bluetooth or the like to allow the ebike 105 motor controller 106 two communicate with the e trailer 110 motor controller 111 a portable user device 125 e g a smart phone or the like which may store control parameters 130 relating to control of the ebike 105 motor controller 106 may use a communications link 135 e g bluetooth a docking port on the ebike 105 or some other mechanism such as may be known to communicate with the motor controller 106 in addition.