MAD Helper springs are progressively wound steel coil springs fitted in conjunction with the original suspension. MAD Progressive Springs have little or no effect while the vehicle is unladen. As the load imposed on the suspension increases, the springs quickly become stiffer, reducing the amount of “sag,” improving the ride height, handling and safety of the laden or towing vehicle. Where space or the design do not permit an additional spring, a complete replacement main-spring is fitted with the same improved characteristics.

MAD Air Helper kits consist of air-bags which can be fitted either between the axle and the chassis or where space permits inserted inside the original coil-spring. Inflation is carried out either from a garage tyre-inflator or portable compressor via a fill-valve. Alternatively an on-board compressor can be fitted and operated from the driver’s seat to increase or decrease pressure to obtain the most comfortable and best ride height dependant on the load in the vehicle.