These self-adjusting brakes are self-contained and low maintenance. With surge brakes, the hydraulic braking system uses the natural momentum of the trailer to actuate the brakes. This means that when you step on the brake in the towing vehicle (and slow down), the pressure of the trailer pushing against the hitch presses a hydraulic cylinder. Therefore, the more the towing vehicle slows, the more pressure it exerts on the trailer brakes. When they are set up properly, surge brakes are smooth, easy to work with, and require no adjustment. This means there is no need for you to make any changes between loads, and there are no buttons, levers, or