Mounting a rooftop tent on the INEOS Grenadier requires a crossbar system rated for the tent's weight and built to interface with the Grenadier's factory T-slot roof rails. The DVA DualTrack™ 4-bar kit slots directly into the factory mounting points — no drilling — and provides 400 lb of static load capacity and 200 lb dynamic. Your RTT's manufacturer brackets connect to the DualTrack's dual L-Track channels using standard L-Track hardware. The whole install takes 45–60 minutes with two people and a torque wrench.
Quick Answer
Use the DVA DualTrack™ 4-bar crossbar kit for any RTT installation on the INEOS Grenadier. It bolts to the factory roof rails (no drilling), carries 400 lb static / 200 lb dynamic, and provides dual L-Track channels on each bar for your tent's mounting hardware. Crossbar torque: M8 factory rail bolts 20–25 Nm. Tent clamp bolts: 10–12 Nm (or per your tent manufacturer). Use a helper — the tent weighs 60–130 lb depending on model.
Why 4 Bars, Not 2
The DualTrack system is available in 2-bar and 4-bar configurations. For a rooftop tent, 4 bars are required. Here's why the numbers matter:
| Configuration | Static Load | Dynamic Load | RTT Capable? |
|---|---|---|---|
| DualTrack 2-bar | 200 lb | 100 lb | Marginal — most RTTs are 65–130 lb |
| DualTrack 4-bar | 400 lb | 200 lb | Yes — rated for RTT loads |
Dynamic load is what counts during driving — washboard roads, speed bumps, off-camber recovery lines. The 4-bar kit gives you a genuine 200 lb dynamic rating distributed across four contact points, with even load transfer to the Grenadier's factory mounting rails. DVA recommends a minimum of four crossbars for RTTs; for larger hard-shell designs over 100 lb, four bars spaced across the full roof span remain the standard approach.
What You'll Need
All hardware below is bolt-on, no permanent vehicle modifications required.
- DVA DualTrack™ 4-Bar Crossbar Kit — 6061-T6 aluminum, black powder coat, dual L-Track per bar, 58.5" span, 5 lb per bar
- 8-Pack L-Track Threaded Lugs — heavy-duty L-Track fittings for attaching RTT brackets to the DualTrack channels (use 2 per crossbar, 8 total for 4-bar install)
- Your rooftop tent with manufacturer-supplied mounting brackets (most use 52–58 mm wide channel hardware, compatible with DVA's dual L-Track profile)
- Calibrated torque wrench (0–40 Nm range)
- M8 socket (for factory rail bolts), appropriate socket for your tent bracket bolts
- A second person — essential for lifting the tent onto the crossbars safely
- Spirit level and measuring tape for centering the tent on the roof
If you plan to add an awning to the same DualTrack bars, the DVA Awning Mount for DualTrack Rails mounts to the same L-Track channel — one install handles both accessories.
Step-by-Step Installation
Mount the DualTrack crossbars to the factory roof rails
Slide each DualTrack bar into the Grenadier's factory roof rail T-slots, spacing them evenly across the roof length. For a 4-bar install on a Station Wagon, start with the front bar approximately 8 inches from the front rail stop, then space the remaining three bars evenly toward the rear. Once positioned, tighten the M8 rail-interface bolts to 20–25 Nm. Do not exceed 25 Nm — the factory mounting points are aluminum and over-torquing compresses the extrusion. Check each bar for side-to-side rock before proceeding.
Insert L-Track threaded lugs into each crossbar channel
Each DualTrack bar has two L-Track channels running the full bar length (one on each side of the center rib). Slide two L-Track threaded lugs into the channel at the position your tent's mounting brackets will land — typically matching the tent manufacturer's bracket spacing spec. Leave the lugs finger-tight at this stage so you can slide them to the final position once the tent is on the roof.
Position and measure before lifting the tent
Before lifting the RTT, mark the roof centerline with a grease pencil and measure your intended tent footprint front-to-rear. This saves the most frustrating adjustment: repositioning a 100 lb tent on a roof. Set the crossbar spacing to match your tent's mounting rail span. Place a spirit level on the roof to confirm the bars are sitting flush. Write down your lug positions — you'll thank yourself when fine-tuning with the tent in place.
Lift the tent onto the crossbars
Use your helper for this step — do not attempt solo. Soft-shell tents are manageable at 60–80 lb but awkward due to the folded mattress overhang. Hard-shell designs are typically 90–130 lb and rigid. Lift from opposite ends simultaneously and rest the tent's mounting rail directly on top of the DualTrack crossbars, aligning each bracket hole over its L-Track lug. Do not stand on the DualTrack bars; rest your weight on the Grenadier's roof frame if needed.
Torque the tent brackets to the L-Track lugs
Thread the tent bracket hardware (typically M8 or M10 bolts, supplied by the RTT manufacturer) into the L-Track threaded lugs. Slide the lugs to final position with the tent in place before torquing. Torque to your tent manufacturer's spec — most specify 10–20 Nm for the bracket-to-rail interface. DVA recommends not exceeding 15 Nm on the L-Track lug itself regardless of tent spec; the extrusion holds well below this threshold but over-torquing can strip the thread insert. Check all four corners for equal tension, then re-check after your first 50 km of driving.
Route the tent ladder clear of the rear door
The Grenadier's rear swing door opens wide — about 100 degrees with the factory stop. Most RTTs mount with the ladder extending off the rear of the vehicle. Before finalising position, open the rear door fully and confirm the tent's deployed ladder footprint clears the door arc. If you're on a Quartermaster, confirm the bed rail doesn't conflict with the tent's side overhang. Centre the tent on the roof laterally to keep weight even across the driver and passenger rail rails, and to avoid the safari window trim on Wagon models.
Torque Reference
| Connection | Hardware | Torque Spec |
|---|---|---|
| DualTrack bar to factory rail | M8 factory rail interface bolt | 20–25 Nm |
| L-Track lug seat | L-Track threaded lug | Max 15 Nm |
| RTT bracket to L-Track lug | M8 or M10 (tent-supplied) | Per RTT mfr — typically 10–20 Nm |
What Grenadier Owners Are Saying
TheIneosForum's RTT threads have been active since 2023, with owners working through hardware compatibility, noise, and off-road durability. Two observations that come up consistently:
"I had to modify the standard mounting hardware to accommodate the larger bars, but it all worked out. We drove the Grennay from Ohio to Maine and back with no problems whatsoever."— Owner, TheIneosForum #12415944 (June 2024) — on adapting RTT bracket hardware to Grenadier crossbar dimensions
This is the single most common pain point in the forum threads: standard RTT brackets weren't designed for the Grenadier's crossbar width. L-Track hardware (like DVA's threaded lugs) eliminates this step — the L-Track standard is what most RTT manufacturers design for when selling "crossbar-mount" kits.
"Honestly don't think it adds more than 5 or 10% more noise and probably no more than just the crossbars alone. I don't really keep track of mileage but it's been surprisingly manageable on highway."— logsplitter, TheIneosForum #12415944 page 2 (June 2024) — on wind noise after RTT install
Wind noise scales with roof height — a soft-shell tent adds roughly 3–4 inches above the crossbars when folded; a hard-shell adds 5–8 inches. The DVA DualTrack bars have an ultra-low ~1 inch profile, which keeps the tent as close to the roofline as possible and reduces the noise penalty compared to full-height rack platforms.
Accessories to Install at the Same Time
With the DualTrack bars already on the roof, two accessories pair naturally with an RTT build:
- DVA Awning Mount for DualTrack Rails — mounts to the same L-Track channel, no additional roof hardware. Slides along the bar to clear the tent footprint. Most owners put it driver-side rearward, opposite the tent ladder drop point.
- L-Track Slider for DualTrack Rails — lets you reposition accessories (lights, camera mounts, etc.) along the L-Track without removing the bar. Useful for builds that evolve after the initial RTT install.
The full Grenadier roof rail system — crossbars, awning mounts, sliders, and L-Track lugs — is available through the DVA Roof Crossbars & Rails collection. All Grenadier accessories are listed at dvamechanics.com/collections/all-grenadier.