INEOS Grenadier Bike Rack: Roof, Rear Door & Hitch Options Ranked

The 80.7" Problem — Why Most Owners Abandon Roof Mounts

The INEOS Grenadier stands 2,050 mm (80.7") to the top of the four OEM roof plastic strips. Add a set of cross bars (typically 25–35 mm profile height) and you're at 81.5" to the mounting surface. Load a mountain bike — wheel-up in a fork-mount tray — and the peak height exceeds 88". Load two bikes and you're working at head height for most people.

This isn't unique to the Grenadier; it's a reality for any tall 4WD. But the Grenadier's squared-off roofline and high seating position make it notably taller than most competitors. The forum discussion is blunt on this point:

“I think most of us are using hitch receiver mounts rather than roof mounts. Some have added swing mounts to those — pretty cool looking IMO. Hitch mounts mean you don't need a crane to get the bike up top.”

— Forum member, Bike rack thread, TheIneosForum.com, March 2025

That said, roof mounting is the right call in specific scenarios: when the hitch is occupied by a trailer, when you need to carry a kayak or boards alongside bikes, or when garage height clearance permits. The key is knowing the constraints before you commit to hardware.

Method 1: Roof-Mounted Bike Racks

What You Need as a Base

A roof-mounted bike rack cannot bolt directly to the Grenadier's OEM roof plastic strips or rain gutters — you need a cross bar or rail system that provides a horizontal T-slot or round bar for the bike carrier to clamp onto. The Grenadier offers three base options:

• Factory-style gutter-mount bars: Mount to the rain gutters on either side of the roof. Low cost, universal fitment. Most fork-mount bike trays (wheel-up style) require ≥55 mm bar spacing — verify your crossbar dimensions.
• Grab-handle bolt-mount rails: The rear 3/4 mount configuration uses the factory grab handle assembly bolts instead of rain gutters. Forum consensus: grab handle bolts are stiffer, less prone to creep under repeated load cycles.
• DVA DualTrack roof rails: DVA's extruded aluminum rail system for the Grenadier provides both an L-Track and a 25 mm T-slot channel in a single profile. Bike carriers that accept T-bolt mounting clip directly to the upper channel — no adapter plates needed. The dual-channel profile also holds solar panels, lights, and cargo alongside your bike tray without rail crowding.

Weight Budget

The Grenadier's dynamic roof load limit is 330 lb (150 kg) — and that limit includes the rack itself, not just the bikes. A typical roof rail + crossbar setup weighs 15–25 lb. Two mountain bikes at 25–30 lb each add 50–60 lb. That's 65–85 lb total, well within the 330 lb dynamic limit — but approach it as a budget, not a cap. If you're also running a solar panel or lighting bar, add those weights to your calculation before loading.

Bike Carrier Types for Roof Mounting

There are two styles of roof-mount bike carrier and both work on the Grenadier with the right base rail:

• Fork-mount (wheel-up): Front wheel removed, fork bolts to a tray. Lowest profile, most secure for road and XC bikes. Not ideal for full-suspension mountain bikes — removing the front wheel in a muddy trail parking lot is tedious.
• Upright wheel tray: Both wheels stay on. Higher profile (adds more height than fork-mount). Easier loading but the bike sits higher and adds more aerodynamic drag. Best for casual use where convenience matters more than height clearance.

Method 2: Rear Door / Ladder-Mounted Bike Racks

For owners who haven't yet installed a tow bar — or who want a quick solution without modifying the roof — the Grenadier's rear ladder provides a sturdy mounting point for swing-arm bike trays.

One forum owner documented the approach clearly:

“[Bike tray] bolted to the ladder with some tube clamps off of Amazon. The lower arm is also supported by a cable for when they mount their stuff vertically on the backs of vans. Attached to the small door, swings nice and out of the way.”

— Forum member, Bike Rack thread, TheIneosForum.com, January 2024

Hardware Requirements

The Grenadier ladder uses two bar sizes. The vertical members are 1.25" (31.75 mm) diameter. The horizontal rungs are 1" (25.4 mm) diameter. Any clamp-based mount needs rubber bushings sized for these — standard aftermarket tube clamps typically span 1"–1.5", so confirm fit before ordering.

Key constraints for door-mounted racks:

• The rear door weight limit is approximately 50 lb including the rack — most single bike trays stay under this, but add the bike and you're at the limit with an average mountain bike
• The door must be able to fully open for loading — measure clearance behind your vehicle before finalizing a swing-arm tray design
• Check that bike pedals and handlebars clear the rear glass when swung open at various angles

Method 3: Hitch-Mounted Bike Racks (Forum Consensus Choice)

The most common approach among Grenadier owners who are serious about cycling. A hitch-mounted platform rack eliminates the height problem entirely — loading height is typically 28–36" off the ground, well within easy-lift range. No roof load budget impact. No aerodynamic penalty above the roofline.

The Grenadier requires the INEOS-spec tow bar for standard hitch mounts, or an aftermarket hitch receiver (2" standard) designed for the Grenadier's rear crossmember. Most owners use a platform-style rack (tray-style, both wheels on) rather than hanging fork racks for ease of loading on trail approaches.

“The added weight is a huge downside [for roof racks], along with the added height. It will also cost you 2 mpg. Unlike bars they are also hard to take down and only used for occasional use. Harder to use for longer or wider items compared to bars. Lots of wind noise.”

— okgo, The Ineos roof rack — talk me out of it, TheIneosForum.com, May 2026

The only scenario where hitch-mounted racks fall short: when the hitch is already carrying a trailer or camper. In that case, roof mounting or a rear-door swing arm is the backup.

Hitch Rack Checklist for Grenadier Owners

• Receiver size: Verify 2" receiver — most modern platform racks are 2" only
• Anti-sway bar: The Grenadier's independent rear suspension can transfer bike sway to the vehicle on rough roads — a hitch receiver anti-wobble lock (set screw or cam lock) is worth adding
• Swing clearance: The Grenadier's rear door opens to approximately 180° — some swing-away hitch racks can block partial door access at their default stop position; measure before purchase
• Tongue weight: A loaded 2-bike platform rack with two full-suspension bikes can reach 80–100 lb of tongue weight. Verify this is within the Grenadier's rear hitch tongue weight spec for your market

Which Method Is Right for Your Use Case?

Roof Bike Rack Install: Step-by-Step Overview

If you've decided on roof-mounted bikes, here's the install sequence. This assumes you already have a roof rail system (cross bars) in place.

1. Confirm rail compatibility. Fork-mount bike trays use either a round bar clamp (for traditional crossbars) or a T-bolt insert (for T-slot rails). DVA DualTrack rails accept T-bolt mounting directly on the upper channel — no adapter needed.
2. Set crossbar spacing. Most fork-mount trays require crossbar spacing of 24"–32" between front and rear bars. Check the bike carrier spec sheet before positioning your rails.
3. Mount the bike tray to the crossbars. Hand-tighten first, confirm the tray is centered side-to-side, then torque to spec (typically 5–8 Nm for T-bolt systems — check your carrier's instructions).
4. Remove the front wheel (for fork-mount systems). Place the fork onto the tray axle, tighten the fork clamp. Most systems use a 12 mm or 15 mm thru-axle adapter or a QR skewer interface — verify your bike's axle standard matches the tray.
5. Secure the rear wheel. Strap the rear wheel into the tray cradle using the included hook strap or hook-and-loop strap. Avoid over-cinching against carbon frames.
6. Re-check and test. Grab the bike and try to twist it on the tray. No movement means the mount is secure. Drive slowly for the first 500 meters and re-check before highway speeds.

The Practical Verdict

For most INEOS Grenadier owners, hitch-mounted bike racks are the right call — easier loading, no roof load budget impact, and no 88" solo-lift required. If the hitch is occupied or unavailable, the rear door ladder mount is the quickest no-modification path for 1–2 bikes.

Roof mounting makes sense when you need to carry bikes alongside a kayak, boards, or other gear that genuinely belongs on the roof — or when you already have a rail system in place for other accessories. In those cases, a T-slot compatible fork-mount tray slotted into the DVA DualTrack upper channel is the cleanest integration: no adapter hardware, shared rail with existing accessories, and the 330 lb dynamic budget has enough headroom for 2–3 road bikes with room left over for lighting and a solar panel.

Whatever method you choose, get the step situation sorted first. Eight feet of Grenadier roof deserves a proper step — not a tire climb or a improvised stool.