Front Runner Slimline 3 Roof Rack Kit for Lexus GX 550
Front Runner Slimline 3 Roof Rack Kit for Lexus GX 550
Two Things to Check Before Ordering
- The standard sunroof stays fully operational. Panoramic sunroof models are not suited to this mounting system.
- The OEM roof rails have to come off for installation. Factor that into the job.
The GX 550 is a genuinely capable truck wearing a luxury badge, which puts its owners in an awkward spot: the people building these are serious about it, and the aftermarket is still catching up. This is the Dometic Front Runner Slimline 3, a purpose-built Lexus GX550 roof rack rather than a universal platform on a generic mount.
This GX550 roof rack is a 92.1 inch flat platform, 51.2 inches wide, sitting 3.1 inches tall and 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.
Full-Length Platform, Working Sunroof
This is the detail worth leading with. Most full-length 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. Ninety-two inches of platform loaded with a tent and an awning, and you can still open the roof on a good day.
The exception is the panoramic sunroof. This mounting system is not suited to those models, which is a hard limit rather than a caution. Check which one you have before ordering, and call us at 844-200-3979 if you are not certain.
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. Across 92 inches of platform where you may be arranging a tent, an awning, boards and cargo together, that saves an afternoon every time the build changes.
Full Length or Three Quarter?
There are two Slimline 3 options for a GX 550 roof rack build. Same tray design, same easy-release mounting, different amount of roof.
| Full Length (this kit) | Three Quarter | |
|---|---|---|
| Platform Length | 92.1" | 60.3" |
| Platform Width | 51.2" on both | |
| Net Weight | 100.17 lbs | 74.13 lbs |
| Rear of Roof | Covered | Left clear |
| Standard Sunroof | Fully operational on both | |
| Best For | Tent, awning, boards and cargo together | Lighter builds, rear kept clear |
Choose full length if you want everything on the roof at once with room to lay it out properly, or you carry long loads that need support along their length.
Choose the three quarter version if you want to keep 26 lbs off the roof and leave the back of the vehicle unobstructed.
About the OEM Roof Rails
The factory roof rails need to come off before this rack goes on, since the mounting system attaches to the roof rather than working around the rails. That is normal for a platform rack of this type.
Worth planning for. It adds a step to the install, and you will want somewhere to keep the rails if you ever intend to put the vehicle back to standard, which matters more on a Lexus than on most trucks. The easy-release mounting system means the rack itself can come off later without disturbing any roof seals, so this is a one-time job done properly.
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, and across 92 inches that adds up.
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.
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 on a platform this long you will want both on the same rack.
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 sensible across a full-length platform.
- 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 |
| Not Suited To | Models with a panoramic sunroof |
| Standard Sunroof | Fully operational with the rack installed |
| Platform Dimensions | 92.1" L x 51.2" W x 3.1" H (2340mm x 1300mm x 80mm) |
| Overall Product Height | 4.47" (including mounting system) |
| Net Weight | 100.17 lbs |
| OEM Roof Rails | Must be removed for installation |
| 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 | KRLE101T |
| Warranty | Limited Lifetime Warranty |
What's Included
Slimline 3 Tray, 1300mm W x 2340mm L
Mounting System (shared with the LC250 Prado platform)
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 mounting system. The mount guide covers OEM rail removal.
Pros
- Standard sunroof stays fully operational with the rack fitted
- A full-length 92.1 inch Lexus GX550 roof rack, enough for a tent and the rest of your gear
- 3.1 inch height, 20% lower than the Slimline II
- Slats move individually without dismantling the rack
- Dual T-slot channels with staggered insertion points and adjustable pitch
- Removable without disturbing roof seals
- Integrated corner tie-downs and concealed wire routing
- Opens up the full Front Runner catalogue on a vehicle with a young aftermarket
- Limited Lifetime Warranty
Cons
- Not suited to panoramic sunroof models
- OEM roof rails must be removed for installation
- At around 100 lbs it is a substantial addition to roof weight
- Dometic does not publish a load rating for this kit
- Slimline II accessories that rely on the older slat spacing may need checking
Frequently Asked Questions
Will my sunroof still work?
If it is the standard sunroof, yes, fully operational with the rack installed. Dometic engineered the kit around it, which is unusual for a full-length platform. The mounting system is not suited to panoramic sunroof models. Check which you have before ordering, and call us at 844-200-3979 if you are not sure.
Do I have to remove my factory roof rails?
Yes. The OEM roof rails must come off before the rack can be installed, since the mounting system attaches to the roof rather than working around the rails. Keep them somewhere safe if you ever want to return the vehicle to standard. The rack itself can be removed later without disturbing roof seals, so this is a one-time job.
Should I get the full length or the three quarter?
Full length at 92.1 inches if you want a tent, an awning, boards and cargo on the roof at the same time, or you carry long loads. The three quarter version at 60.3 inches keeps 26 lbs off the roof and leaves the rear clear. Both are 51.2 inches wide and both keep the standard sunroof usable.
Can I mount a rooftop tent on it?
Yes, and at 92.1 by 51.2 inches a tent uses only part of the platform, leaving room for an awning and boards. Dometic does not publish a load rating for this kit, 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 that leaves the factory rails alone. 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
Standard or Panoramic Sunroof?
That one answer decides whether this rack fits. Tell us which you have and we will confirm before you order.
844-200-3979
