Mechanical braking systems are speed and load sensitive. They provide the right amount of braking every time – regardless of the load. This is the European standard braking system.
As the load in the trailer increases the chances that any loaded two-horse trailer will outweigh the towing vehicle also increases. For safety, the trailer needs to be braked earlier and for longer than the lighter towing vehicle.
Mechanical brake systems are designed to apply the brakes on the trailer before the tow vehicle begins to brake, such that the trailer never pushes on the tow vehicle Braking on the trailer initiates as the tow vehicle begins any deceleration. The mechanical brake begins to operate as the driver comes off the accelerator pedal and before getting to the brake pedal. As the tow vehicle begins to slow down, pressure is applied to the tongue of the trailer, enabling the braking system.
Under all circumstances, whenever the tow vehicle begins to push on the trailer, the trailer brakes are applied in direct proportion to the weight of the trailer at the time and at the rate of deceleration. European brake systems also provide an independent parking brake, emergency breakaway and anti-lock characteristics.