Front Runner Slimline 3 3/4 Roof Rack Kit for Lexus GX 550
Front Runner Slimline 3 3/4 Roof Rack Kit for Lexus GX 550
Not every GX 550 build needs the whole roof covered. This is the three quarter Dometic Front Runner Slimline 3, a GX 550 roof rack that gives you a proper working platform while keeping 26 lbs off the roof and leaving the rear of the vehicle clear.
This Lexus GX550 roof rack platform measures 60.3 inches long by 51.2 inches wide and sits 3.1 inches tall, 20% lower than the Slimline II, which cuts drag, wind noise and fuel consumption. The standard sunroof remains fully operational with the rack fitted. Slats move individually without dismantling the rack, dual T-slot channels take accessories at multiple pitches, and all four corners carry integrated tie-down points. The easy-release mounting system lets the rack come off without disturbing any roof seals. Heat-treated aluminium and high-strength 3CR12 stainless steel, black powder coated, with stainless fasteners. Limited Lifetime Warranty.
Your Sunroof Still Works
Most platform racks sit over the sunroof and quietly end it as a feature. On a GX 550, where you paid for that sunroof, giving it up to carry gear is a poor trade.
Dometic engineered this kit so the standard sunroof stays fully operational with the rack mounted, and on a three quarter platform that makes even more sense, since the tray sits forward of the rear anyway.
If your GX has a panoramic roof, check with us first. Dometic flags that as a limitation on the Land Cruiser 250 Prado kits, which use this same mounting system, and we would rather you call than find out after the fact. Reach us at 844-200-3979.
Three Quarter or Full Length?
There are two Slimline 3 options for a GX 550. Same tray design, same easy-release mounting, same width, different amount of roof.
| Three Quarter (this kit) | Full Length | |
|---|---|---|
| Platform Length | 60.3" | 92.1" |
| Platform Width | 51.2" on both | |
| Net Weight | 74.13 lbs | 100.17 lbs |
| Rear of Roof | Left clear | Covered |
| Standard Sunroof | Fully operational on both | |
| Tray Part | MRSTG07 | MRSTG11 |
| Best For | Tent plus gear, lighter build, rear clear | Everything on the roof at once |
Choose three quarter if you want a serious platform without adding 100 lbs to the roof, or you want the back of the vehicle left alone. For most GX 550 owners this is the sensible pick.
Choose the full-length version if you want a tent and an awning and boards and cargo all laid out at once, or you carry long loads.
Full Width, Shorter Length
Worth noticing: the three quarter kit is exactly as wide as the full-length version at 51.2 inches. Only the length changes.
That matters more than it sounds. On 60.3 inches of length with the full width available, a rooftop tent still fits with room beside it for boards or an awning. You are giving up rear overhang, not usable working area, and you save 26 lbs doing it on a vehicle that is tall to begin with.
Move Slats Without Dismantling Anything
On the Slimline 3 you can add, remove, or shift individual slats without taking the rack apart. Fitting a new accessory no longer means pulling the tray down and rebuilding it around the mount. Slide the slats to where the gear needs them and carry on, which saves an afternoon every time the build changes.
Lower, Quieter, Cheaper to Run
Height is where this Front Runner roof rack separates itself. The Slimline 3 platform is 3.1 inches tall, a 20% reduction on the Slimline II.
Less Drag
A lower platform presents less frontal area, which shows up directly in fuel consumption on a long highway run.
Less Wind Noise
The most common complaint about any platform rack, and it matters more on a quiet vehicle than a loud one.
Better Clearance
A GX 550 is tall before you add anything, and taller again once lifted. Every inch counts in a garage.
Comes Off Without Unsealing the Roof
The easy-release mounting system uses an exclusive extrusion that lets you remove the rack without disturbing any roof seals. The mounting hardware stays in place and sealed while the rack lifts away.
That matters on a Lexus more than on most trucks. You are not repeatedly breaking seals on a vehicle you intend to keep clean and watertight, and at 74 lbs seasonal removal is a realistic option rather than a job you avoid for three years.
Dual T-Slots and Staggered Insertion
Each slat carries dual T-slot channels with multiple staggered insertion points along its length, and slats can be set to different mounting pitches.
That means you can insert hardware at several points rather than threading it from one end, and you can change spacing to suit what you are mounting. A rooftop tent wants different pitch to a pair of recovery boards, and the Slimline 3 lets you set each without compromise.
Details That Show Up in Daily Use
Integrated Tie-Down Points
All four corners have built-in tie-down points compatible with Stratchits, Stratchit shorties, and other lightweight securing straps. No add-on brackets needed for the strapping most people do most often.
Concealed Wire Routing
Dedicated channels within the side profiles let you route wiring for lights and other electrical accessories out of sight. Corner sections include built-in pass-throughs and breakout tabs, so wires enter and exit cleanly rather than being cable-tied along the outside of the rack. On a vehicle with this finish, keeping the wiring hidden is worth the effort.
Full Accessory Compatibility
Every Front Runner top-mount accessory works with the Slimline 3. That matters here, since dedicated Lexus GX550 accessories are still arriving. The Front Runner catalogue gives you tables, jack mounts, shovel brackets, can holders, light mounts and awnings immediately rather than waiting for the aftermarket.
Built for Weather and Abuse
- Heat-treated aluminium for the tray and slats, keeping weight down without giving up strength.
- High-strength 3CR12 stainless steel in the structural components, chosen for corrosion resistance in wet and salty environments.
- Weather-resistant black powder-coated finish over the top.
- Stainless steel fasteners as standard, not an upgrade.
Specifications
| Vehicle | Lexus GX 550 |
| Coverage | Three quarter length |
| Standard Sunroof | Fully operational with the rack installed |
| Platform Dimensions | 60.3" L x 51.2" W x 3.1" H (1532mm x 1300mm x 80mm) |
| Overall Product Height | 4.47" (including mounting system) |
| Net Weight | 74.13 lbs |
| Tray Material | Heat-treated aluminium |
| Structural Material | High-strength 3CR12 stainless steel |
| Fasteners | Stainless steel |
| Finish | Weather-resistant black powder coat |
| Slat System | Movable slats, dual T-slot channels, staggered insertion points, adjustable pitch |
| Tie-Down Points | Integrated at all four corners |
| Wire Routing | Concealed side channels with corner pass-throughs and breakout tabs |
| Mounting | Easy-release system, removable without disturbing roof seals |
| Accessory Compatibility | All Front Runner top-mount accessories |
| SKU | KRLE100T |
| Warranty | Limited Lifetime Warranty |
What's Included
Slimline 3 Tray, 1300mm W x 1532mm L
LC250 Prado / Lexus GX550 ¾ Mount System
Ships as a complete kit. Both part numbers have their own install guide below.
📄 Installation Instructions
Two guides, one for the tray and one for the ¾ mounting system.
Pros
- Standard sunroof stays fully operational with the rack fitted
- A GX550 roof rack 26 lbs lighter than the full-length kit
- Full 51.2 inch width, same as the full-length version
- Leaves the rear of the roof clear
- 3.1 inch height, 20% lower than the Slimline II
- Slats move individually without dismantling the rack
- Removable without disturbing roof seals
- Integrated corner tie-downs and concealed wire routing
- Limited Lifetime Warranty
Cons
- Three quarter length, so it does not cover the full roof
- At around 74 lbs it is still a substantial addition to roof weight
- Dometic does not publish a load rating for this kit
- Panoramic roof compatibility is not documented for the GX kits, so confirm before ordering
- Slimline II accessories that rely on the older slat spacing may need checking
Frequently Asked Questions
Should I get the three quarter or the full length?
Three quarter at 60.3 inches if you want a serious platform while keeping 26 lbs off the roof and leaving the rear clear, which suits most GX 550 builds. The full-length version at 92.1 inches if you want a tent, an awning, boards and cargo all laid out at once. Both are 51.2 inches wide and both keep the standard sunroof usable.
Will my sunroof still work?
If it is the standard sunroof, yes, fully operational with the rack installed. Dometic engineered the kit around it. If your GX has a panoramic roof, call us at 844-200-3979 first. Dometic flags panoramic models as a limitation on the Land Cruiser 250 Prado kits that use this same mounting system, and we would rather confirm than have you find out after installation.
Is it narrower than the full-length rack?
No. Both GX 550 kits are 51.2 inches wide. Only the length differs, 60.3 inches here against 92.1 inches on the full version. You keep the full usable width and give up rear overhang rather than working area, which is why a rooftop tent still fits comfortably with room beside it.
Can I mount a rooftop tent on it?
Yes. At 60.3 by 51.2 inches there is room for a tent with space beside it for boards or an awning, since the width matches the full-length kit. Dometic does not publish a load rating, so check your tent's weight against the GX 550's roof load limit before ordering. Call us at 844-200-3979 with the tent you are considering. Browse rooftop tents here.
How does it compare to a Sherpa rack for the GX 550?
Different approaches. The Slimline 3 is a platform tray with movable slats and T-slot channels, built around Front Runner's accessory ecosystem. The Sherpa Atlas is a side plate and crossbar rack with published load ratings and a drill-free install. If you already own Front Runner accessories, this is the natural choice. Call us at 844-200-3979 and we will talk it through.
Can I run wiring for lights through it?
Yes, and cleanly. Dedicated channels inside the side profiles carry wiring for lights and other electrical accessories out of sight, and the corner sections have built-in pass-throughs and breakout tabs so wires enter and exit where you need them. No cable ties along the outside of the rack.
Complete Your Build
Three Quarter or Full Length?
Tell us what you plan to carry and whether your GX has the standard or panoramic roof. We will confirm before you order.
844-200-3979
