1. Product Overview
The RetraxPRO MX Retractable Truck Bed Tonneau Cover is a premium aluminum series cover designed for superior durability, functionality, and security. Its low-profile design integrates seamlessly with your truck, providing excellent protection for your cargo against the elements and theft.

Figure 1: RetraxPRO MX Tonneau Cover installed on a truck bed.
2. Key Features
- Industrial-Strength Aluminum Slats: Provides unsurpassed durability and functionality, capable of holding up to 500 pounds of evenly distributed weight.
- Matte Powder-Coated Finish: Offers scratch resistance and UV protection, maintaining the cover's aesthetic appeal over time.
- Low-Profile Design: Streamlines the overall appearance of your truck while ensuring a tight seal to protect your bed and its contents.
- Compact Storage Canister: Lies flush with the cover and is completely hidden inside the truck bed, featuring a unique spiral track system that protects the cover's finish from scratches during daily use.
- Sealed Ball-Bearing Roller System: Allows the cover to glide effortlessly along the rails with a convenient handle, eliminating the need for pull straps, snaps, or springs.
- Key Lockable in Any Position: Provides unlimited flexibility and security for your cargo storage needs.
- Made in the USA: Manufactured with global materials, ensuring high quality and reliability.
3. Compatibility
This RetraxPRO MX Tonneau Cover (Model 80378) is specifically designed to fit:
- Vehicle: 2021 - 2025 Ford F-150 (including Raptor/Lightning models)
- Bed Size: 5' 7" Bed (67.1 inches)
Ensure your truck's bed length matches the specified dimensions for proper fitment.

Figure 2: Truck bed measurement guide for Ford F-150 models.
4. What's in the Box
Your RetraxPRO MX Tonneau Cover package includes the following components:
- Tonneau Cover Assembly
- Mounting Hardware
- Side Rails
- Installation Guide
5. Setup and Installation
The RetraxPRO MX Tonneau Cover features an effortless clamp-on design for straightforward installation. While many users can install it themselves with basic tools, professional installation is also an option and can ensure optimal fit and function.
Refer to the detailed Installation Guide included in your package for step-by-step instructions specific to your truck model. It is crucial to follow all instructions carefully to ensure proper alignment, sealing, and operation of the cover.

Figure 3: The cover's compact design allows for full bed access when retracted.
6. Operating Instructions
The RetraxPRO MX is designed for smooth and easy operation:
- Opening the Cover: Locate the release mechanism near the tailgate. Press the button or pull the handle (depending on the specific model's mechanism) to disengage the lock. Gently push the cover towards the cab. The sealed ball-bearing roller system will allow it to glide smoothly into its compact storage canister.
- Closing the Cover: Pull the cover from the cab towards the tailgate. Ensure it is aligned with the side rails. Once fully extended, it will automatically latch into place.
- Locking the Cover: The cover can be locked in any position along the rails using the integrated key lock. Insert the key and turn to secure the cover, preventing unauthorized access to your truck bed.

Figure 4: Integrated key lock for enhanced security.
The unique spiral track system within the canister ensures that the cover's panels do not rub against each other when retracted, preserving the finish and smooth operation.

Figure 5: The cover retracts fully into a compact canister, allowing for maximum cargo capacity.
7. Maintenance
To ensure the longevity and optimal performance of your RetraxPRO MX Tonneau Cover, follow these maintenance guidelines:
- Cleaning: Regularly clean the cover's surface with mild soap and water. Avoid abrasive cleaners or harsh chemicals that could damage the matte powder-coated finish. Rinse thoroughly and dry with a soft cloth.
- Track Maintenance: Periodically inspect the side rails and the spiral track system within the canister for any debris (leaves, dirt, etc.) that might hinder smooth operation. Clean as necessary.
- Seal Inspection: Check the weather seals around the perimeter of the cover and where it meets the tailgate and cab. Ensure they are free from cracks or damage to maintain the tight, weather-resistant seal.
- Drainage: Verify that the drainage tubes (if installed) are clear and free of obstructions to allow water to properly exit the truck bed.

Figure 6: Inspect seals regularly for optimal weather protection.
8. Troubleshooting
If you encounter issues with your RetraxPRO MX Tonneau Cover, consider the following common solutions:
- Cover Not Opening/Closing Smoothly: Check the side rails and the canister's spiral track system for any obstructions or debris. Ensure the cover is properly aligned within the tracks.
- Water Leakage: Verify that all weather seals are intact and properly seated around the cover and truck bed. Ensure the drainage tubes are clear and correctly installed. Small amounts of moisture may occasionally enter during extreme weather or car washes, but significant leakage indicates an issue with seals or installation.
- Loose Components: Periodically check all mounting hardware and fasteners to ensure they are secure. Tighten any loose nuts or bolts as needed.
- Locking Mechanism Issues: Ensure the key is fully inserted and turned correctly. Check for any debris in the lock cylinder.
If problems persist after attempting these steps, please contact Retrax customer support for further assistance.
9. Specifications
| Attribute | Detail |
|---|---|
| Brand | RETRAX |
| Model | 80378 (RetraxPRO MX) |
| Style | Manual Retractable |
| Exterior Finish | Machined, Matte Powder-Coated |
| Material | Aluminum |
| Lock Type | Key |
| Weight Limit | 500 Pounds (evenly distributed) |
| Item Weight | 90 pounds |
| Product Dimensions | 74 x 5 x 7 inches (packaged) |
| Automotive Fit Type | Vehicle Specific Fit (2021-2025 Ford F-150 5' 7" Bed) |
| UPC | 840563104759 |
10. Warranty and Support
The RetraxPRO MX Tonneau Cover is backed by a Legendary Lifetime Guarantee. Retrax is committed to ensuring its products meet high quality and durability standards and are free from defects in materials and workmanship.
For warranty claims, technical support, or any product-related inquiries, please contact Retrax customer service. You can also visit the official RETRAX Store on Amazon for more information and resources.

Figure 7: Proudly assembled in North Dakota, USA.


