A speed control system for a wheeled article powered by human interaction or via gravitational influences, which is adapted to regulate and/or limit the speed of the wheeled article , the wheeled article comprising a body and one or more wheels mounted to the body , the speed control system comprising; one or more brake units provided so as to engage one or more of the one or more wheels and apply a braking force thereto; a user actuator disposed so as to be operable by a user; a control unit adapted to receive a signal indicative of the actuation of the user actuator when operated by the user and actuate the one or more brake units to engage the one or more wheels ; and restriction means adapted to limit the magnitude of the braking force applied to the one or more wheels from the one or more brake units , wherein the restriction means is adapted to limit the magnitude of the braking force to less than 100 percent of the maximum braking force attainable by the one or more braking units , wherein the user actuator includes actuation means that is compressed by the user's hand and is adapted to move from a start or initial position that imparts no braking force to the one or more wheels , to a final position that imparts a maximal braking force, wherein the restriction means is adapted to convert the actuation of the actuation means over its full range of motion to a partial range of actuation of the one or more brake units , wherein the actuator means is configured to send an electric signal to the restriction means , characterised in that the restriction means is configured to convert the input electric signal from the actuator means to a reduced, partial range of actuation of the one or more brake unit , and wherein the full travel of the actuation means is mapped to any one of 0 to 90 percent, 0 to 80 percent, 0 to 70 percent, 0 to 60 percent, 0 to 50 percent, 0 to 40 percent, 0 to 30 percent, 0 to 20 percent or 0 to 10 percent of the full range of the actuation of the one or more brake units . one or more brake units provided so as to engage one or more of the one or more wheels and apply a braking force thereto; a user actuator disposed so as to be operable by a user; a control unit adapted to receive a signal indicative of the actuation of the user actuator when operated by the user and actuate the one or more brake units to engage the one or more wheels ; and restriction means adapted to limit the magnitude of the braking force applied to the one or more wheels from the one or more brake units , wherein the restriction means is adapted to limit the magnitude of the braking force to less than 100 percent of the maximum braking force attainable by the one or more braking units , wherein the user actuator includes actuation means that is compressed by the user's hand and is adapted to move from a start or initial position that imparts no braking force to the one or more wheels , to a final position that imparts a maximal braking force, wherein the restriction means is adapted to convert the actuation of the actuation means over its full range of motion to a partial range of actuation of the one or more brake units , wherein the actuator means is configured to send an electric signal to the restriction means , characterised in that the restriction means is configured to convert the input electric signal from the actuator means to a reduced, partial range of actuation of the one or more brake unit , and wherein the full travel of the actuation means is mapped to any one of 0 to 90 percent, 0 to 80 percent, 0 to 70 percent, 0 to 60 percent, 0 to 50 percent, 0 to 40 percent, 0 to 30 percent, 0 to 20 percent or 0 to 10 percent of the full range of the actuation of the one or more brake units . <EOS>