Product Description
When you install an aftermarket long-arm suspension on a Jeep Gladiator JT, the rear lower control arm brackets are often relocated along the frame rails. That creates a clearance problem when installing traditional frame-mounted rock sliders because the rear rocker guard mounting brackets can occupy the same space as the suspension brackets. The Motobilt MB1259 Frame Mounted Rocker Guards are designed specifically for Gladiator builds where rear long-arm suspension mounting locations require additional fabrication clearance.
Unlike body-mounted rocker guards that transfer impacts into the sheet metal and body mounts, the MB1259 rock sliders weld directly to the Jeep frame. This creates a barrier between the Gladiator body and trail obstacles while directing impacts into the frame instead of the body panels.
The MB1259 kit includes a pair of fully welded rocker guard assemblies with the rearmost frame mounting connections left off. Loose mounting tubes, plates, and gussets are included so the installer can position and fabricate the rear frame connections around the existing long-arm suspension brackets. This allows the mounting layout to be adapted to many aftermarket rear long-arm suspension configurations without having to redesign the entire rocker guard.
The main slider sections are constructed from 2" DOM steel tubing. The frame mounting plates, end caps, center bracing, and gussets are fabricated from 3/16" steel plate, with laser-cut and CNC-formed components used throughout the assemblies.
These Gladiator rock sliders are built for fabricators who need frame-mounted rocker protection without ignoring the suspension packaging underneath the Jeep. The kit ships in bare steel and requires fitting, welding, and protective finishing. Step-by-step installation instructions are included to guide the fabrication and installation process.
Important Information
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Fits 2020-current Jeep Gladiator JT
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Designed for aftermarket rear long-arm suspension applications
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Sold as a pair, driver and passenger side
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Frame-mounted design transfers trail impacts into the vehicle frame
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Main rocker guard assemblies arrive fully welded, except for the customizable rear frame mounting connections
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Includes loose rear mounting tubes, plates, and gussets
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Rear mounting connections must be positioned, fitted, and welded during installation
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Allows rear frame mounts to be fabricated around many aftermarket long-arm suspension brackets
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Main slider tubing constructed from 2" DOM steel
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Frame mounting plates, end caps, center bracing, and gussets constructed from 3/16" steel
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Laser-cut and CNC-formed steel components
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Certain 2019–2020 Gladiator JT models with three-bolt transmission crossmembers on the passenger-side frame rail require trimming the base of the mounting bracket
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Requires installation by a qualified welder or fabricator
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Ships bare steel and must be painted or coated before use
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For Gladiators without a rear long-arm suspension, see the standard MB1193 Frame Mounted Rocker Guards
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Made in the USA
Product Specifications
Part Number: MB1259
Vehicle Fitment: 2020-current Jeep Gladiator JT
Suspension Application: Aftermarket rear long-arm suspensions
Main Slider Tubing: 2" DOM steel tubing
Frame Mount Material: 3/16" steel plate
End Caps and Center Bracing: 3/16" laser-cut and formed steel plate
Rear Mounting Components: Loose steel tubes, plates, and gussets for custom fitting and welding
Mounting Method: Weld-on frame mounts with installer-fabricated rear mounting connections
Finish: Bare steel
Quantity: Pair, driver and passenger side
Dimensions (H/W/D): 94" x 28" x 12"
Weight: 275 lbs
Manufactured: Made in the USA
Related Motobilt Product:
MB1193 Standard Frame Mounted Rocker Guards for Jeep Gladiator JT
Installation Notes
The MB1259 requires welding and fabrication. The rocker guard assemblies are supplied with the rearmost frame mounting connections left off so the installer can position those connections around the rear lower control arm brackets used by the aftermarket long-arm suspension.
Test fit the rocker guards against the frame rails and identify the suspension bracket locations before cutting, positioning, or welding the loose rear mounting components. The supplied tubes, plates, and gussets allow the rear mounting connections to be adapted to the available space. Final mounting geometry will depend on the suspension configuration.
Certain 2019–2020 Gladiator JT models equipped with a three-bolt transmission crossmember on the passenger-side frame rail require trimming the base of the mounting bracket for clearance.
The kit ships in bare steel. Complete all fitting and welding before applying the final protective finish. If powder coating is used before final installation, coating must be removed from all weld areas, and those areas must be protected after welding.
Always disconnect the vehicle battery cables before welding. Installation should be completed by a qualified welder or fabricator familiar with frame-mounted components and suspension bracket clearance.
Step-by-step installation instructions are included.
Frequently Asked Questions
Why do I need different frame-mounted rock sliders for a Jeep Gladiator with a long-arm suspension?
Many aftermarket rear long-arm suspension systems relocate the rear lower control arm mounting brackets along the frame rails. These brackets can interfere with the rear mounting connections of conventional frame-mounted rock sliders. The MB1259 provides loose rear mounting components so the installer can fabricate those connections around the suspension brackets.
What is the difference between MB1259 and MB1193 Gladiator rock sliders?
The MB1193 is the standard frame-mounted rocker guard for Jeep Gladiator JT applications. The MB1259 is designed for Gladiators with aftermarket rear long-arm suspensions and includes customizable rear frame mounting connections. If your Gladiator does not have a long-arm suspension, the standard MB1193 is the recommended option.
Are the MB1259 rocker guards fully welded when they arrive?
The main rocker guard assemblies arrive fully welded, but the rearmost frame mounting connections are intentionally left off. The kit includes loose tubes, plates, and gussets that must be positioned and welded during installation to accommodate the vehicle's suspension brackets.
Will MB1259 fit every aftermarket Gladiator long-arm suspension?
The MB1259 is designed to accommodate many aftermarket rear long-arm suspension configurations, but mounting bracket locations vary between suspension manufacturers. The installer must verify available frame clearance and determine the appropriate position for the rear mounting connections before welding.
Do the MB1259 Gladiator rock sliders require welding?
Yes. These are weld-on frame-mounted rocker guards that require fabrication of the rear mounting connections. The kit should be installed by a qualified welder or fabricator. The rock sliders ship in bare steel and require a protective finish after fabrication.
