Reinforced springs

What are reinforced springs used for?

The standard springs are designed for the vehicle's weight when empty or lightly loaded. When the vehicle regularly carries heavy loads—trailers, caravans, delivery vans, or cars with a constantly full trunk—the original springs sag, the rear axle drops, and the vehicle loses geometry, stability, and control. MAD reinforced springs maintain the correct ride height even under load, improving safety and handling.

What is the difference between HV and NR systems?

HV systems are mechanical springs—made of steel—that reinforce or replace the original spring with a stiffer spring rate. They are the simplest and most economical solution, requiring no maintenance. NR systems are pneumatic: air springs that inflate or deflate according to the load, allowing for real-time adjustment of height and stiffness. The main advantage of NR systems is that the vehicle continues to drive comfortably even with a light load; mechanical HV systems always operate at the same spring rate regardless of the load.

What is the difference between the NR kit with an onboard compressor and the one that uses an external compressor?

Basic kits (NR without a letter or NR-B) include Schrader valves accessible from outside the vehicle—just like tire valves—and can be inflated with any external compressor or tire inflator. Comfort kits (NR-C, NR-CS, NR-CM) include an onboard compressor installed in the vehicle, with an interior control panel from which you can adjust the air spring pressure without leaving the car. The NR-R kit adds an automatic self-leveling sensor.

Do MAD reinforced springs require approval for the MOT test?

It depends on the type of system. Kits that replace the original spring with one of a different spring rate are considered a major modification and must be certified. Auxiliary systems installed alongside the original spring without modifying it may be considered differently, but in any case, we recommend consulting a certification specialist before installation. Contact us, and we'll advise you based on the specific kit and your vehicle.

How do I know which MAD reference I need for my vehicle?

Each MAD part number is designed for a specific model. The last digit (in HV) or the final letters (in NR) of the part number indicate the type of installation. Compatibility by make, model, and year is listed on each product page. If you have any questions about which system best suits your needs—type of load, whether you want manual or automatic adjustment, or if the vehicle has factory-installed air suspension—please contact us before purchasing, and we'll help you choose the correct part number.