Keep your van level, predictable, and comfortable under load. MAD coil-in-coil helper springs add progressive support to your existing suspension—no air lines, no compressors, no maintenance.
What are helper springs?
Helper springs are add-on springs that engage as your vehicle squats under weight. MAD’s coil-in-coil design nests a secondary spring inside the OE coil, delivering progressive support only when needed.
Benefits
- Reduce rear sag and headlight lift
- Cut body roll and sway on highways and in crosswinds
- Protect shocks, bushings and tires by keeping geometry in range
- Maintenance-free — set and forget
Helper springs vs other solutions
| Solution | Pros | Trade-offs |
|---|---|---|
| Coil-in-coil (MAD) | Progressive, quiet, no maintenance | Not height-adjustable |
| Air bags | Adjustable ride height/leveling | Lines/compressor, periodic checks |
| Add-a-leaf | Raises static spring rate | Stiffer when unloaded |
| Rubber bump stops | Simple and affordable | On/off feel, limited tuning |
Fitment & popular vans
- Mercedes-Benz Sprinter (cargo, crew, passenger)
- Ford Transit (T-150 / T-250 / T-350)
- RAM ProMaster (1500 / 2500 / 3500)
- Mercedes Metris
Safety & legality
Helper springs improve support and stability but do not change the vehicle’s GVWR or towing capacity. Always load within the manufacturer’s ratings.
Installation & maintenance
Most kits bolt on with standard tools. Typical install time: 1–2 hours per axle. No ongoing adjustments required.
TÜV approval unless noted.
Prices in USD. Prices include tax and local import fees; exclude fitting.
FAQs
Do helper springs increase payload?
No. They reduce sag and sway but do not increase GVWR.
Will ride quality change when empty?
Minimal. The secondary spring engages progressively under load, so unloaded ride remains close to stock.
Why MAD coil-in-coil?
Engineered in Europe with TÜV approval where applicable, designed for vans and camper conversions.
