The INEOS Grenadier ships from the factory with capable suspension — Eibach coil springs on Carraro solid beam axles, a bespoke two-speed Tremec transfer case, and Eaton electronically actuated locking differentials. But for owners running larger tires, loading the vehicle with overlanding gear, or tackling technical trails, a suspension lift is one of the first modifications that comes up.
The aftermarket has responded quickly. Within two years of the Grenadier reaching customers, owners now have options ranging from simple 30mm spring swaps to complete 2.5-inch performance kits with reservoir shocks and adjustable linkages. But every option comes with trade-offs — and one critical engineering concern that can leave you stranded if you get it wrong.
This guide breaks down every lift approach available for the Grenadier, what real owners report after installation, and the front driveshaft angle issue that shapes every decision.
The OEM Suspension: What You're Starting With
Understanding the factory setup is essential before changing anything. The Grenadier uses a live solid axle front and rear with coil springs — a layout shared with vehicles like the Jeep Wrangler and classic Land Rover Defender. The axles are manufactured by Carraro, a specialist in heavy-duty agricultural and off-road components. Factory springs are supplied by Eibach, and the standard shock absorbers are monotube units.
The Grenadier's factory ride height gives approximately 10.4 inches (264mm) of ground clearance. Many owners find that adequate for fire roads and light trails, but technical terrain — rock shelves, deep ruts, water crossings — quickly exposes the limits of stock clearance, particularly under the differentials.
One design characteristic matters enormously for lift planning: the front driveshaft uses a Rzeppa-type CV joint at the transfer case end. This joint has an operating angle range, and the factory geometry already runs closer to the margin than many owners expect.
Lift Option 1: Spring Swap Only
The simplest and most affordable path is replacing the factory coil springs with taller units. Eibach — the same manufacturer that supplies the OEM springs — offers aftermarket lift springs in several heights for the Grenadier.
Available Spring Heights
| Spring Kit | Front Lift | Rear Lift | Notes |
|---|---|---|---|
| Eibach Pro-Lift (Euro spec) | ~30mm (1.2") | ~30mm (1.2") | Conservative, retains OEM ride character |
| Eibach Pro-Lift (US spec) | ~1.7" | ~1.2" | Leveling effect, removes factory front rake |
| Eibach 2.5" (US spec) | ~2.5" | ~1.5" | Maximum spring-only lift, levels stance |
A spring-only swap typically costs $400–$800 for the springs, plus installation. The key advantage is simplicity: the factory shocks will physically work with the taller springs, and installation is straightforward for any competent shop.
The stock shocks will work with the taller springs — otherwise Eibach would specify that replacing shocks is required with their lift.
— Forum member, The INEOS Forum, Eibach Pro-Lift thread
However, forum members have noted an important distinction about what "lift" actually means with a spring-only swap:
These longer springs do raise the unladen vehicle so constitute a 'lift' for cosmetic purposes. I wouldn't think of it as a lift 'kit' however as the lift only applies unladen and none of the additional components that correct geometry at the new height are included.
— Forum member, The INEOS Forum, Eibach 2.5" lift thread
In plain terms: taller springs raise the resting position, but once you load the vehicle with gear, bumper, winch, and a roof rack full of equipment, the suspension compresses back toward — or past — factory height. The lift number is an unladen measurement.
Eibach's US-spec 2.5" springs use a slightly heavier rate than the Euro 30mm springs. This means better load-carrying capacity and reduced body roll, but it also means the ride becomes firmer when running unladen. If your Grenadier is primarily a daily driver without heavy accessories, the 30mm or 1.7" springs may deliver a better balance of height and comfort.
Lift Option 2: Springs Plus Performance Shocks
Most experienced owners recommend pairing lift springs with upgraded shocks. The factory dampers are adequate at stock height, but once you raise the vehicle, they're operating outside their designed range — particularly on downward travel, where the longer springs allow more extension than the stock shocks were valved for.
Three shock brands dominate the Grenadier aftermarket:
King Shocks
King offers a 2.5-inch front kit with compression adjuster and matching rear shocks for the Grenadier. These are reservoir-equipped, rebuildable performance shocks originally developed for desert racing. Owners consistently describe the King ride as smooth and composed, with a softer feel that excels at absorbing trail imperfections.
Kings make things very buttery if that makes sense. They most certainly help with controlling some body roll as well. They take the truck from feeling iffy to feeling like a solid, planted vehicle.
— dokatd, The INEOS Forum, Suspension Upgrade Options thread
One Florida-based owner running the full King setup (2.5" front kit with compression adjusters, King 1.5 springs, adjustable linkages, and 35-inch tires) reported:
The combo of spring and shocks is a softer and more comfortable on the road. I added two clicks of stiffness to the Kings and am very happy with the on-road feel. It is soft enough to be comfortable but with less body roll around corners. It takes 30 seconds to walk around and dial it in.
— Forum member, The INEOS Forum, New Suspension thread
King shocks are rebuildable — a meaningful advantage for owners who wheel hard. Expect to pay approximately $2,000–$3,000 for a complete set.
Fox Performance Series
Fox offers the 2.0 Performance Series for the Grenadier, typically paired with Eibach 35mm Pro springs. Fox shocks tend toward a firmer on-road feel compared to King, which some owners prefer for daily driving and highway towing.
The Fox shocks did a great job keeping the ride smooth and stable, reducing sway, and building confidence in towing on road with this setup. The rear end stayed planted, and the vehicle remained perfectly stable, even as the trailer tried to dance its way out of line.
— Forum member, The INEOS Forum, Fox Performance Suspension Kit Initial Impressions
One owner summed up the Fox vs. King decision neatly:
Fox's offer a bit of a firmer ride, vs. Kings offering a bit more supple ride. So I feel like Fox's may be a bit of a better option for the on-road daily driver stuff.
— avidtest, The INEOS Forum, Suspension Upgrade Options thread
Oleo-Pneumatic (Nimbus)
The newest entrant is oleo-pneumatic suspension — a technology more commonly found on military vehicles. Nimbus offers a system that can provide approximately 1–1.5 inches of lift without requiring spring changes. The Nimbus strut functions independently of the coil spring, though the OEM springs are still needed to spread load across the shock mounts.
This technology is still relatively new in the Grenadier aftermarket, and most forum members recommend waiting for more long-term data from US-based installations before committing. The promise is compelling — adjustable ride height, progressive damping, and reduced maintenance — but servicing availability outside major metros is a valid concern.
Lift Option 3: Complete Suspension Systems
For owners planning serious off-road use, complete suspension kits address the geometry changes that springs alone cannot correct.
A complete system typically includes:
- Lift springs (front and rear, matched rates)
- Performance shocks (typically 2.5" body with reservoir)
- Adjustable track bars (front and rear, to re-center axles)
- Adjustable control arms or linkages (to correct caster and pinion angles)
- Extended brake lines (to accommodate increased travel)
- Steering stabilizer (to improve return-to-center and reduce wander)
The advantage of a complete kit is that every geometry change created by the lift gets corrected simultaneously. Adjustable linkages allow precise alignment of the driveshaft angles, which is particularly critical on the Grenadier.
Complete kits from established manufacturers run $4,000–$6,000+ before installation. Professional installation with alignment adds another $800–$1,500 depending on your shop and location.
The Critical Issue: Front Driveshaft Angle
This is the single most important consideration for any Grenadier lift, and it deserves its own section.
The Grenadier's front driveshaft uses a Rzeppa-type CV joint at the transfer case. Unlike a simple U-joint, a CV joint operates smoothly across a range of angles — but that range has hard limits. The factory suspension geometry already places this joint near the higher end of its comfortable operating angle.
Multiple Grenadier owners — both lifted and stock-height vehicles — have experienced front driveshaft CV boot failures. The acute driveline angle generates heat, causing the rubber boot to tear and spill grease, which leads to CV joint failure and immediate loss of forward propulsion. A suspension lift increases these angles further. This is not a theoretical concern — it has caused real trail recoveries.
What the community has found so far:
- CV boot failures have occurred on stock-height vehicles too, suggesting the factory angles are already marginal in some cases
- Lifts above 2 inches significantly increase risk unless corrective geometry components (adjustable linkages, track bars) are installed to reduce the operating angle
- Springs-only lifts are the highest risk because they increase height without any geometry correction
- Some owners are fitting aftermarket high-angle CV joints as a proactive replacement
The front axle is by design not lift friendly whatsoever. The angles are already marginalized at factory height so you exacerbate the shaft angles, especially at the transfer case side, with any added lift.
— Forum member, The INEOS Forum, Front Drive Shaft Repair thread
The practical implication: if you lift beyond 1.2 inches, budget for adjustable linkages and track bars that allow driveshaft angle correction. A springs-only 2.5" lift without geometry correction is inviting a front driveshaft failure, particularly during aggressive off-road articulation.
The Steering Stabilizer: Worth It Regardless of Lift
Whether or not you lift the Grenadier, owners almost universally recommend adding an aftermarket steering stabilizer. The factory unit is adequate, but both Fox and King offer significantly upgraded stabilizers that transform the steering feel.
Also fitted the King steering stabiliser — makes a huge difference. Wheel can be turned quicker and has some return to centre assistance. For me it makes it a better driving experience. Most noticeable improvement is when reversing the trailer.
— Forum member, The INEOS Forum, Suspension Upgrade Options thread
A quality steering stabilizer runs $200–$400 and can be installed independently of any other suspension work. Many owners consider it the single best ride-quality improvement per dollar on the Grenadier.
Tire Clearance After Lifting
One of the primary reasons owners lift the Grenadier is to fit larger tires. Here's what the community has validated:
| Lift Height | Max Tire Size | Notes |
|---|---|---|
| Stock | 265/70R17 (OEM) | No modifications needed |
| 1.2" (30mm springs) | 275/70R17 | Minimal trimming if any |
| 1.7" (US spec springs) | 285/75R17 (~34") | May need minor fender work at full lock |
| 2.5" (with geometry correction) | 315/70R17 (~35") | Requires proper linkage adjustment; check full-lock clearance |
An important point from the forums: taller springs alone do not increase clearance at full compression. They raise the resting height, but when the suspension fully compresses over a bump, the tire-to-body distance at that extreme is unchanged. Only bump stop modifications or longer shocks engineered for the lifted height actually address compression clearance.
Warranty Considerations
This varies significantly by market. In Australia, owners have reported that the Eibach 40mm lift kit is covered under warranty when installed by a licensed mechanic. In the US, the picture is less clear — dealers have varied responses, and the general rule is that any failure caused by the modification can be denied coverage, but unrelated systems should not be affected.
The safest approach: use a reputable installer with Grenadier-specific experience, keep all documentation, and have the alignment verified against factory specifications (adjusted for the new ride height).
Decision Framework: Which Lift Path Is Right for You?
Match Your Lift to Your Usage
- Mostly highway, occasional fire roads: Eibach 30mm springs + steering stabilizer. Conservative, retains warranty confidence, addresses the light front-end feel. Budget: ~$600–$1,000 installed.
- Regular trails, loaded with accessories: Eibach 1.7" springs + Fox or King shocks + steering stabilizer. The sweet spot for most owners — meaningful clearance gain with controlled driveshaft angle risk. Budget: ~$2,500–$3,500 installed.
- Serious off-road, 35" tires, full armor: Complete 2.5" kit with adjustable linkages, performance shocks, extended brake lines, and steering stabilizer. This is the only responsible way to run a 2.5" lift. Budget: ~$5,000–$7,500 installed.
- Towing priority: Eibach HD springs (heavier rate for load carrying) + Fox shocks. Fox's firmer valving excels at controlling sway under towing loads. Add a steering stabilizer. Budget: ~$2,500–$3,500 installed.
Regardless of which path you choose, three rules apply to every Grenadier lift:
- Inspect your front CV boots before and after installation — and check them regularly afterward
- Get a proper alignment from a shop that understands solid-axle geometry — not just any tire shop
- If lifting beyond 1.2 inches, invest in adjustable linkages — the driveshaft angles are not optional to correct
The Grenadier's solid-axle, coil-spring suspension is fundamentally excellent for off-road modification. The aftermarket is maturing rapidly, and owners who've installed proper kits consistently report dramatic improvements in ride quality, stability, and capability. The key is matching your lift height to your actual usage and respecting the engineering constraints — particularly that front driveshaft — rather than chasing maximum height for its own sake.