Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your extang Solid Fold ALX Hard Folding Truck Bed Tonneau Cover, Model 88425. The Solid Fold ALX is designed for durability and ease of use, featuring 1-inch thick, dent and scratch-resistant automotive-grade polymer panels. It offers quick installation and watertight seals to protect your cargo. Please read these instructions thoroughly before proceeding with installation or operation to ensure proper function and longevity of your tonneau cover.
Product Compatibility
The extang Solid Fold ALX Tonneau Cover, Model 88425, is specifically designed to fit the following truck models:
- 2009-2018 Dodge Ram 1500/2500/3500 with a 5' 7" Bed (67.4 inches)
- 2019-2020 Classic Dodge Ram 1500/2500/3500 with a 5' 7" Bed (67.4 inches)
It is crucial to verify your truck bed length and body style (New vs. Classic for 2019-2020 models) to ensure proper fitment. This cover is designed for classic body style trucks without RamBox cargo management systems.

Image: Truck Bed Measurement Guide. This diagram illustrates how to accurately measure your truck bed length and identifies compatible Ram 1500 models, specifically highlighting the 5' 7" bed for classic body styles without RamBox.
Setup and Installation
The Solid Fold ALX tonneau cover is designed for quick and easy installation, typically taking less than five minutes. The cover comes fully assembled, requiring no drilling or special tools for most applications.
1. Initial Placement
- Carefully place the folded tonneau cover onto the front of your truck bed, ensuring it is centered and aligned with the bulkhead.
- Unfold the first panel towards the tailgate, making sure the seals sit flush against the bed rails.
2. Securing the Cover
- Locate the engineered clamps on the underside of the cover.
- Engage the clamps onto the truck bed rails. Tighten them securely by hand. Ensure the clamps are firm but do not overtighten.
- Repeat for all clamps along the bed rails, ensuring even pressure for a watertight seal.

Image: Clamp Mechanism. This image shows a detailed view of the engineered clamp used to secure the tonneau cover to the truck bed rails, highlighting its design for secure attachment.

Image: Securing Clamps. A different perspective of the clamps, demonstrating how they engage with the truck bed for a tight and secure fit.

Image: Installed and Folded Cover. This image displays the extang Solid Fold ALX tonneau cover fully installed on a truck bed, shown in its folded position near the cab.
Operating the Tonneau Cover
The Solid Fold ALX is designed for simple operation, allowing quick access to your truck bed.
1. Folding and Unfolding
- To open, release the rear latches located on the underside of the cover near the tailgate.
- Fold the rear panel towards the middle panel.
- Release the middle latches and fold the two panels towards the cab.
- To close, reverse the process, ensuring each panel locks securely into place and the seals are properly seated.
2. Securing in Open Position
When the cover is fully folded against the cab, use the integrated straps and buckles to secure it in place. This prevents the cover from unfolding during transit and allows full bed access.

Image: Latch Mechanism. This image provides a close-up view of the latch mechanism, which is used to secure and release the tonneau cover panels.

Image: EnduraSheild Panels. A detailed view of the EnduraSheild panels, highlighting their textured surface and robust construction designed for protection.

Image: Fully Extended Cover. This image shows the extang Solid Fold ALX tonneau cover fully extended and covering the entire truck bed, demonstrating its complete protective coverage.
Maintenance
Regular maintenance will ensure your tonneau cover remains in optimal condition and provides long-lasting protection.
- Cleaning: Wash the tonneau cover regularly with mild soap and water. Avoid abrasive cleaners or harsh chemicals, as these can damage the polymer panels and seals. Rinse thoroughly and allow to air dry.
- Seal Inspection: Periodically inspect the perimeter seals for any signs of wear, cracking, or damage. Ensure they are free of debris to maintain a watertight seal.
- Hardware Check: Annually, check all clamps and hardware for tightness. Retighten if necessary, but do not overtighten.
- Panel Care: The automotive-grade polymer panels are dent and scratch-resistant, but avoid placing excessively sharp or heavy objects directly on the cover to prevent potential damage.
Troubleshooting
Here are solutions to common issues you might encounter:
- Water Leaks: If you notice water in your truck bed, first check that all clamps are securely tightened and that the perimeter seals are clean and properly seated against the bed rails. Ensure the tailgate is closed tightly.
- Difficulty Latching/Unlatching: Check for any obstructions in the latch mechanism. Ensure the cover is properly aligned on the bed rails. Lubricate moving parts with a silicone-based lubricant if necessary.
- Cover Not Lying Flat: Verify that the cover is correctly positioned on the bed rails and that no cargo or debris is preventing it from sitting flush. Adjust clamps as needed to ensure even tension.
Specifications
| Feature | Detail |
|---|---|
| Model Number | 88425 |
| Product Dimensions | 195.58 x 88.9 x 16.51 cm (77 x 35 x 6.5 inches) |
| Item Weight | 28.58 kg (63 lbs) |
| Material | Aluminum, Automotive-grade Polymer |
| Exterior Finish | Matte Black |
| Lock Type | Tailgate (requires truck tailgate lock for security) |
| Weight Limit (Capacity) | 272.16 kg (600 lbs) |
| Country of Origin | USA |
| Automotive Fit Type | Universal Fit (for specified truck models/bed sizes) |
Warranty Information
The extang Solid Fold ALX Tonneau Cover is backed by a 5-year warranty, known as extang's Maximum Strength Warranty. This warranty covers defects in materials and workmanship under normal use. For specific terms, conditions, and to register your product, please refer to the official extang warranty documentation or contact customer support.
Customer Support
For technical assistance, warranty claims, or any questions regarding your extang Solid Fold ALX Tonneau Cover, please contact the manufacturer, extang, or RealTruck customer service. Contact information can typically be found on the product packaging or the official RealTruck/extang website.