Ineos Grenadier Air Suspension Conversion

The Ineos Grenadier has earned its place as the spiritual successor to the classic Land Rover Defender — engineered without compromise for those who demand genuine off-road capability without sacrificing daily usability. But even the Grenadier has its limitations. Under load — whether towing, carrying heavy equipment or running a fully kitted-out expedition setup — the standard coil suspension allows the rear to sag, affecting ride quality, handling stability and approach angles. At On Air Suspension, we've designed a full air suspension conversion that solves this and takes the Grenadier's capability to another level entirely.
 
What Is the Grenadier Air Suspension Conversion?
 
Our in-house designed air suspension kit replaces the Grenadier's standard coil suspension with a fully adjustable air system, giving you on-demand control over ride height at the touch of a button. Available as a full 4-corner conversion or rear-only kit, the system is engineered specifically for the Grenadier's chassis geometry — not adapted from another platform.
 
The rear-only kit directly addresses the loaded rear sag problem — maintaining constant ride height regardless of payload, eliminating the handling and clearance issues that come with a sagging rear end. The 4-corner kit goes further, giving full independent height control at all four corners.
 
What's Included?
 
Every component in the kit is selected and in many cases manufactured specifically for the Grenadier. Key components include:
Bespoke On Air / SABO air springs with heavy duty solid pistons — matched to Grenadier suspension geometry
AMK OAA S1 compressor — the same premium low-noise, low-vibration unit used in our Defender conversion
Stainless steel height sensor brackets — corrosion resistant for long-term reliability
Grenadier-specific rear chassis to compressor bracket and mid tank mounting with reinforcement
Single sensor tank dump system — enables rapid deflation for instant access height
Grenadier-specific bump stops and top brackets
All fixings, nylon tubing, fittings and hardware included
 
Benefits
 
Adjustable ride height* — Lower for easy cabin access, raise for maximum off-road clearance
Improved on-road ride quality — Air springs absorb road noise and vibration more effectively than standard coils
Automatic load levelling — Maintain constant ride height regardless of load** — ideal for towing or carrying heavy equipment
Eliminates loaded rear sag — No drop in ride height when the vehicle is loaded, towing or carrying heavy gear
Increased off-road clearance* — Raise the vehicle beyond standard height when the terrain demands it
Improved stability and handling — Optimised suspension geometry under all load conditions — particularly under load where standard coils compromise handling
Constant ride height under load — **No sagging under payload up to the vehicle's GVW
*Features available with 4-corner system
 
Is Rear Sag a Problem on Your Grenadier?
 
If your Grenadier sits noticeably lower at the rear when loaded — whether towing a trailer, carrying a roof tent and expedition gear, or running heavy accessories — the standard coil suspension is working against you. Rear sag reduces ground clearance at the rear, affects approach and departure angles, and alters handling balance. Our rear air suspension conversion eliminates this entirely, maintaining the correct ride height regardless of what you're carrying. The air springs replace the coils and work automatically to keep the vehicle level — you can also adjust height manually at the touch of a button.
 
Designed and Built in the UK
 
Every On Air Suspension kit begins on our CAD systems. Our in-house engineering team designs each solution from scratch, prototypes using advanced 3D printing, and validates through physical installation and testing at our Ongar, Essex workshop before a kit ever reaches a customer. Brackets and structural components are manufactured to our specifications by trusted UK suppliers. We don't fit other people's kits — we build our own.