Helper Springs for Campers & RVs (USA)

Upgrade the suspension on the most popular U.S. camper van platforms — Mercedes-Benz Sprinter, RAM ProMaster, and Ford Transit. MAD helper springs restore ride height, improve stability in crosswinds, and keep your motorhome comfortable under real payload.

TÜV-approved components where noted. Kits are bolt-on and low-maintenance. Does not change GVWR or tow ratings — always follow the vehicle manufacturer’s limits.

Why add helper springs to your RV?

  • Less sag with water tanks, interior build-out, and cargo aboard
  • Better control in corners and crosswinds; reduced body roll
  • Smoother ride on highway chatter and secondary roads
  • Protects chassis by sharing the load with the main springs
  • No airline leaks — predictable support without compressors or valves

How MAD helper springs work

A secondary spring supports the main leaf (rear axle) or a reinforced coil replaces the OE front spring (front axle). Support is progressive — light when the van is empty and firmer as payload increases — so day-to-day comfort is preserved.

  • Rear axle: add-on helper springs sit beside the main leaf pack
  • Front axle: reinforced coils (optionally paired with KONI FSD)
  • Install time: typically ≈45–90 minutes (rear), ≈120 minutes (front)

Supported U.S. camper platforms

Ford Transit (2015–present)

Versatile Class B platform with strong aftermarket support. Progressive rear helper springs for mixed payloads, constant-load options for full conversions, and front reinforcement choices.

Choosing the right kit

  • Mixed-load travel? Choose progressive rear helper springs (great when tanks/gear vary).
  • Always-loaded conversion? Choose a constant-load rear kit matched to your typical payload.
  • Front heavy build? Add reinforced front coils (+20/+30/≈+35 mm depending on model).
  • Comfort + control upgrade? Pick a Special Duty kit with KONI FSD shocks (where applicable).

Need help sizing? Tell us your build, weight, and use — we’ll suggest the best match.

FAQ

Do helper springs increase my RV’s GVWR?

No. They improve support and handling but do not change the manufacturer’s ratings. Always stay within GVWR/GAWR and tow limits.

Will the ride get harsh when the van is empty?

Progressive designs stay light at low loads and add support as payload builds, so day-to-day comfort remains.

How long is installation?

Rear helper springs are typically ≈45–90 minutes. Front coil swaps are ≈120 minutes and should be followed by an alignment.

Ready to upgrade your RV?

Prices shown on kit pages are in USD and include tax and local import fees; fitting excluded.