Mercedes-Benz Sprinter (W907/W910)
Popular tow rig for campervans and service builds. Choose progressive rear helpers for occasional towing, or constant-load for frequent tongue weight. 4x4/AWD and FWD options available by model.
Helper Springs for Towing
Reduce rear-end squat, improve stability, and keep your headlights level when towing. MAD helper springs add predictable support under tongue weight while preserving everyday ride comfort.
Works great on popular U.S. towing vans: Mercedes-Benz Sprinter, RAM ProMaster, and Ford Transit. Bolt-on kits. Low maintenance. Does not change GVWR/GAWR, tow ratings, or GCWR.
Why add helper springs for towing?
- Cut squat from trailer tongue weight so the van stays level
- Better stability in crosswinds and during lane changes
- Improved steering & braking by restoring proper weight balance
- Headlight aim stays correct(no blinding oncoming traffic)
- No airlines or compressors — consistent, maintenance-light support
How MAD helper springs support tongue weight
A secondary spring supports the main leaf on the rear axle (where tongue weight sits). Rate builds progressively as the rear compresses, so you get supple ride when unladen and strong support once the trailer is on the hitch.
- Progressive (mixed-load) kits — perfect if you tow occasionally and drive unloaded between trips
- Constant-load kits — best for vans carrying permanent cargo or frequent high tongue weights
- Optional KONI FSD shock packages — add control over undulations and trailer-induced oscillations
Supported towing platforms
RAM ProMaster (2014–present)
Front-wheel-drive van that benefits noticeably from rear support when towing. Mixed-load kits keep empty-van comfort; constant-load kits handle steady tongue weight for cargo and camper builds.
Ford Transit (2015–present)
Excellent tow platform when rear suspension support is added. Pair progressive helpers with a weight-distribution hitch for stable highway manners on varying loads.
Choosing the right kit for towing
- Know your tongue weight: aim for 10–15% of trailer weight (per manufacturer guidance).
- Pick your profile: Progressive if you sometimes tow and sometimes don’t; Constant-load if you carry tools/conversion gear and tow frequently.
- Consider damping: select a Special Duty kit with KONI FSD if you want extra control over trailer-induced bounce.
Helper springs improve support and stability but do not increase GVWR/GAWR or tow ratings. Use a brake controller and follow your vehicle’s towing guidelines.
Installation & maintenance
- Rear install time: typically ≈45–90 minutes; torque at ride height
- Front options: reinforced coils where applicable; alignment recommended
- Maintenance: no airlines, valves, or compressors to service
Need a hand? Find an installer or contact us with your trailer and payload details.
Ready to tow with confidence?
Prices shown on kit pages are in USD and include tax and local import fees; fitting excluded.
