Rear Motor Hub for the Nanrobot D4+ 2.0 (older model). To determine if you need this motor for the D4+ 2.0 scooter, check the motor for a "RoadRunner Scooters" engravement. If there is no engravement, select this model.
Front and Rear motors differ for the D4+ 2.0 scooter.
Contact RoadRunner Scooters for assistance in ordering correct parts.