Oleo-Pneumatic Suspensions

From Artillery to Automotive:
Over a Century of Proven Performance

Battlefield-born physics, engineered for modern 4x4 control.

Operating Envelope -52°C to +150°C Arctic cold to sustained desert heat
Validation Protocol 50 bar / 48h Pressure test on every single unit
System Architecture N₂ + Hydraulic Oil Progressive spring plus precision damping
Technology Index
Etymology

Let's start by breaking down the word oleo-pneumatic.

Oleo means "oil", and pneumatic means "containing air or gas under pressure."

1908

Military Origins

In 1908, the first practical oleo-pneumatic application is credited to the French engineer Paul Doumer, who developed the oleo-pneumatic shock absorber for military artillery. This innovation allowed artillery pieces to return to their firing position smoothly after each shot, increasing accuracy and rate of fire.

The Vickers machine gun and other rapid-fire weapons incorporated oleo-pneumatic mechanisms to manage the forces generated by their automatic fire. This adaptation allowed smoother operation and significantly reduced mechanical stress on the components.

1925

The Springless Car

In 1925, George Messier, a French engineer, had the idea to use this concept to install the first suspensions of this kind on a car. The "springless car" was an immediate success, with over 150 vehicles equipped within the first year, proving that oleo-pneumatic principles could transform automotive comfort and handling.

George Messier springless car at La Carrosserie Moderne showroom
1930s–50s

Aviation Standard

As oleo-pneumatics became the standard for airplane landing gear, the technology proved itself in the most demanding environments on earth. Every commercial aircraft that lands today relies on oleo-pneumatic struts to absorb the enormous forces of touchdown, a testament to the technology's reliability and progressive load management.

1950s–70s

The Golden Age of Automotive Adoption

Citroën, followed by Mercedes and Rolls Royce, adopted this technology under the guidance of another French visionary, Paul Magès. These legendary marques demonstrated that oleo-pneumatic systems could deliver a level of ride comfort and road-holding that conventional springs and dampers simply could not match.

Today

Nimbus: The Next Chapter

Today, Nimbus takes this proven technology and engineers it specifically for modern 4x4s and SUVs. Each unit is hand-crafted in our factory near Toulouse, France, using aerospace-grade materials and precision-calibrated valving. The result is a suspension system that carries over a century of engineering heritage in every component.

Core Principle

The same principle that lands commercial aircraft.

Nimbus uses nitrogen as a progressive spring and hydraulic oil for precise damping. The system absorbs small vibrations that cause fatigue and controls big impacts so the vehicle stays composed on road and off road.

-62°F to +302°F
-52°C to +150°C

Operating Temperature Range

From arctic cold to sustained desert heat. Aluminum 6082 bodies dissipate heat under extreme use. Proprietary hydraulic oil remains fluid across the full range.

Conventional shocks typically fail above 80°C. Nimbus operates nearly twice that.

N2
Dry Nitrogen Gas

Progressive Spring, No Coils

Gas pressure increases exponentially as the unit compresses, soft over small road imperfections and progressively firmer under heavy load. Unlike linear coil springs, the stiffness adapts naturally through gas physics.

Pressure set at build time per vehicle weight and expected payload.

TiN
Titanium Nitride

Dual-Layer Piston Rod Coating

Hard chrome base for structural integrity, topped with Titanium Nitride for significantly lower friction. Reduces stiction so the rod responds immediately, even to the smallest inputs.

Lower friction means less heat, less seal wear, and consistent damping over the life of the unit.

50 bar
48 hours submerged

Every Unit Pressure Tested

Each unit is pressurized to 50 bar and submerged underwater for 48 hours before it leaves the workshop. No sampling. Every single unit is individually tested and traceable by serial number.

Validation includes pressure retention and seal integrity checks on each unit.

212 kN
Max static rating / 127 kN dynamic

Special PTFE-Lined Spherical Bearings

Self-lubricating, maintenance-free spherical bearings with a special PTFE liner. Depending on bearing size, datasheet ratings range from 112 to 212 kN static and 67.5 to 127 kN dynamic.

Must never be greased externally. Always state load case with values: static versus dynamic.

0
External adjustments

No Clickers. No Guessing.

In an oleo-pneumatic system, changing gas pressure adjusts both spring rate and damping force simultaneously, keeping their ratio mathematically correct. No mismatched setups. No user error.

Traditional shocks let you adjust one without the other, risking poor ride or damage.

How It Works

How Oleo-Pneumatic Works in the Real World

Each Nimbus unit combines nitrogen gas and hydraulic oil in one sealed body. The system reacts as a whole, so it stays calm on small chatter and composed when terrain gets rough.

As the unit compresses, gas volume drops and pressure rises. That gives you a progressive spring effect. At the same time, oil moves through calibrated valves to control compression and rebound.

During use, gas and oil form a controlled emulsion. That is normal in this architecture and part of why Nimbus can blend comfort with control.

On pavement, the vehicle feels more planted. Off road, impacts are managed earlier so harsh bottom-out is far less likely.

The Syringe Analogy

Imagine a syringe with the tip blocked.

1

At the start, the plunger moves easily. That is your comfort zone.

2

Push deeper and pressure ramps up fast. That is your support on bigger hits.

That is why Nimbus can feel supple on small bumps and still resist hard bottom-out when the pace picks up.

What You'll Feel

What Nimbus Does for the Driver

Small Bump Comfort

Smooths small vibrations and chatter that cause fatigue. Low-amplitude inputs are absorbed early, reducing driver strain on long journeys.

Impact Control

Large impacts face rising resistance that prevents harsh bottoming. Progressive nitrogen springing absorbs what conventional shocks can't.

Stability on Road

Progressive springing reduces brake dive and body roll without creating a harsh ride. Confident braking and cornering, every time.

Off-Road Travel

Improves usable suspension travel off road while keeping control on pavement. On rough washboard, oil flow and valving manage heat and keep damping stable.

Close-up of Nimbus TiN coated piston rod and mounting eye
NBS-TiN / Titanium Nitride Current Gen
Surface Technology

TiN Coating

Current generation Erebus and Goliath V2 units feature TiN Coating (Titanium Nitride) applied over a hard chrome base layer on the piston rod.

This dual-layer system reduces friction and stiction, improving how smoothly the suspension responds to inputs. Even small movements are absorbed immediately, translating to a more refined ride from the very first bump.

TiN Coating also provides superior wear and abrasion resistance for extended service life, keeping your Nimbus performing at its best over the long haul.

Reduced friction for smoother response
Lower stiction and response to smallest inputs
Superior wear resistance for longer life
Design Philosophy

The "No Clicker" Approach

Nimbus units do not feature external damping adjustment knobs, known as clickers. This is an intentional engineering choice, not a limitation.

In an oleo-pneumatic system, changing the gas pressure naturally adjusts both the spring rate and the damping force simultaneously. Higher pressure increases support and pushes oil harder against the valve stack, keeping the ratio of spring-to-damping mathematically correct.

This prevents the common user error of creating a mismatched setup, for example high spring rate with soft damping, and eliminates the confusion of managing dozens of possible clicker combinations.

Typical Clicker Setup

Spring Rate High
Damping Low

Easy to mismatch and create instability.

Nimbus Pressure Logic

Spring Rate Matched
Damping Matched

One pressure variable keeps the system in ratio.

Self-Adjusting System

One pressure adjustment. Correct spring and damping, automatically.

Proven Heritage

A Century of Engineering Excellence

Oleo-pneumatic technology, pioneered over a century ago, has been the backbone of superior suspension systems in iconic brands like Citroën, Rolls-Royce, and Mercedes-Benz, consistently delivering unparalleled comfort and performance.

The technology is also extensively used in aviation. Every commercial aircraft landing gear uses oleo-pneumatic struts to absorb the enormous forces of landing.

The French Leclerc tank, weighing in at 55 tons, is the heaviest land vehicle to operate on oleo-pneumatic suspension. Nimbus takes this same battle-proven principle and refines it for your 4x4.

Aviation Heritage
Military Proven
French Leclerc main battle tank, 55 tons on oleo-pneumatic suspension
Leclerc MBT / 55 Tons Oleo-Pneumatic
Product Lines

Two Core Architectures

Nimbus Erebus and Goliath V2 suspension units side by side
NBS-ERB + NBS-GLT / Current Generation Hand-Crafted in France

Erebus

Current Generation

The current generation Nimbus suspension unit for solid axle and rear axle applications. Each unit is a self-contained system combining nitrogen gas and hydraulic oil in a calibrated, sealed body.

Application Solid Axle / Rear
Set of 4 From $5,880
Rod Finish TiN over Hard Chrome

Goliath V2

Coil Over Front

The upgraded Nimbus suspension unit for coil over front suspension platforms. Goliath V2 replaces front springs by design, complemented by two Erebus units at the rear.

Application Coil Over Front
2 Goliath + 2 Erebus From $6,960
Rod Finish TiN over Hard Chrome
Find Your Vehicle
Hand-Crafted in France

The Art of Building a Nimbus

Every unit is assembled, tested, and finished by hand in our South of France facility.

Nimbus technician assembling an oleo-pneumatic suspension unit with braided hose
Assembly
Precision grinding work on a Nimbus suspension component, sparks flying
Machining
Close-up of hands holding a Nimbus cylinder component
Quality Control
Hands holding a finished Nimbus rod and eye assembly
Rod Assembly
Worker at drill press performing precision operations on Nimbus component
Precision Drilling
Hands operating CNC lathe on Nimbus suspension components
CNC Machining

Each unit is hand-crafted using the highest-grade materials we can source, often the same aluminums and components used in aerospace applications. Our factory sits just outside Toulouse, the heart of Europe's aerospace industry and home to Airbus. We are surrounded by a culture of engineering discipline and precision.

Built for Purpose

Where Nimbus Fits

Nimbus is built for modern 4x4s and SUVs that carry weight and see varied terrain. Used by overland, expedition, security, and professional users who need reliability and comfort.

Not a race shock. Not a cosmetic lift kit. Nimbus is a precision instrument tuned for real-world use.

On most vehicles, Nimbus works with the vehicle's springs to create the best balance between comfort and support. Nimbus is tuned to integrate with the springing system, which should assist the unit without taking over. In rough terrain, both the springing and damping architecture work at full intensity together. For Goliath V2 platforms, Nimbus replaces the front spring function by design, and on heavier-use builds Nimbus MAX adds matched coil springs where required.

Explore Vehicle Fitment →
Land Rover Defender overlanding with Nimbus oleo-pneumatic suspension
Defender / Overlanding 4× Erebus
Who We Are

Our Story

Nimbus Suspensions is a family-owned company born from a shared passion for off-road adventure and precision engineering.

Created by Pierre-Olivier and his son Killian, Nimbus aims to bring the performance of oleo-pneumatic suspension systems to serious 4x4 enthusiasts.

With roots in Florida and a growing global presence, from Denver to Melbourne, the company remains grounded in its values of quality, craftsmanship, and community.

Every suspension is hand-built in our South of France facility, reflecting a deep commitment to excellence and a personal legacy shared with every customer.

Care & Longevity

Built to Last. Easy to Maintain.

Nimbus suspensions are designed for longevity. Stick to our care guidelines, and they'll be delivering top-notch performance for decades.

Torque Checks

Re-torque mounting hardware at 100 miles after install, then every 3,000 miles.

Visual Inspection

Check for visible hardware issues, torn bushings, traces of oil, and anything else that does not look right.

Full Service

Optional and based on use. Many clients never need it. We usually suggest to service the Nimbus every 3 years if you are not sure.

Questions & Answers

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