RoadRunner 48V 25A Brushless Speed Controller – F Revision can work with sensored or sensorless motors. To use a sensored motor as sensorless, simply leave the hall effect cable unplugged. Can also be used for brushless Wilderness Energy hub motors but some connectors will likely have to be changed. Also includes plug-in for APM-Display unit. The 25A controllers are the following dimensions: 4.2 inches X 1.7 inches X 6.25 inches (7.7 inches includes the mounting brackets). The 25A controllers weigh 1.65lbs.