UnderCover® - Armor FLEX Hard Folding Tonneau Cover

20 reviews|Item # sp163418
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$1,399.99 - $1,499.99
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Specifications

Cover Type
Hard
Tonneau Type
Folding
Number of Folds
3
Mounting Type
Over Bed Rails
Security
Locking
Toolbox Compatible
No
Toolbox Included
No
Design
Low-Profile
Compatible with Ladder Rack
No
Compatible with Headache Rack
No
Compatible with Bed Caps
Yes
Compatible with Bed Rails
No
Capacity
400 lb
Cover Material
Aluminum
Frame Material
Aluminum
Color
Black

Includes

  • (1) Tonneau Cover
  • Side Mounting Rails, Left and Right (pre - assembled)
  • Hardwares
  • Installation Instructions
  • (2) Drain tubes

Features

Low Profile
Low Profile

Ultra-low profile design rests inside the bed rails allowing for a very sleek look.

Full Access
Full Access

Built in prop rods secure the cover allowing your truck to be driven with the cover fully open.

Prop Rods
Prop Rods

Prop rods conveniently stow in rubber coated clips.

Easy Removal
Easy Removal

Entire cover can be removed in seconds with no tools needed.

Secure Design
Secure Design

Plastic buckles and straps are included to secure the panels in the partially open position.

Weather Resistant
Weather Resistant

Rubber seals and drain tubes channel water away from and out of the bed.

Product Details

Armor FLEX Hard Folding Tonneau Cover by UnderCover®. The new ArmorFlex hard folding cover is designed to protect your truck bed and its contents while maintaining its strength, style, and durability. Heavy-duty panels are coated with a LINE-X® specialty automotive coating designed to provide advanced protection from dents and scuffs, even in the most extreme environments. The dual-action tailgate seal offers universal tailgate operation, allowing you to close the tailgate with the last panel of the cover-up or down.

Installation

UnderCover® - FLEX™ Tri-Fold Tonneau Cover Installation And ReviewUnderCover® - FLEX™ Tri-Fold Tonneau Cover Installation And Review
UnderCover® - FLEX™ Tri-Fold Tonneau Cover InstallationUnderCover® - FLEX™ Tri-Fold Tonneau Cover Installation
UnderCover® - Armor FLEX™ Hard Tri-Fold Tonneau Cover InstallationUnderCover® - Armor FLEX™ Hard Tri-Fold Tonneau Cover Installation

If you're seeking a reliable tonneau cover that can give you easy access to the truck bed and at the same time provide excellent cargo protection, this product is the right option. The cover boasts of the simple things and simple details that turn it into the next generation of folding tonneau covers. Featuring a low profile design, the Flex cover rests inside the bed rails and definitely adds to the truck's appearance. The panels of the cover have a three-layer construction: the core material is expanded polystyrene. The applied materials make the cover extremely lightweight, as well as dint- and rust-resistant.

Even though the Flex cover is one of the lightest tonnos in the industry, it is strong enough to support up to 400 lbs of evenly distributed weight. The panels are treated with a UV inhibitor, so the finish will never fade. And even if you happen to get caught in the rain, your cargo will be securely protected since the rubber seal and drain tubes will channel water away from and out of the bed.

Perhaps one of the main benefits of the Flex cover is that it installs a lot faster than any other tonno out there. Even if you already have bed extender or any factory cargo management system, this cover will fit and work just great. It will come with a complete hardware kit: two rails, clamps that are unique to your truck, mounting bolts, installation guide, and warranty instructions. Basically, the only tool you will need is a 9/16 wrench, and there will be no drilling involved.

You can fold your cover all the way to the cab and then secure it with the convenient prop rod to get full bed access. The great thing about Flex is that it doesn't actually come into contact with the cab, so there will be no damage caused by friction. And if you want to secure the panels in the partially open position, you can use the plastic buckles and straps that are included with the cover. All Flex covers are proudly manufactured in the USA and carry a 5-year warranty.

Reviews

(20)
Only authorized customers can leave a review on our website. We would love to know what you like or dislike about the product. Share your opinion on product quality, appearance, installation, and other characteristics.
/5
1-10 of 20 Reviews
4 of 5
UnderCover AX42008 Armor Flex Tri-Fold Tonneau Cover
Good solid cover.
Posted by Anthony (Flagstaff, AZ) / November 27, 20182018 Toyota Tundra
4 of 5
UnderCover Tonneau Cover
This cover fits great, and looks great. For us, however is a bit heavy and awkward to remove. We sometimes need to remove the Tonneau cover to haul hay or yard material. We are other than that, very happy with the Tonneau cover.
UnderCover® TR36004 - Triad Hard Folding Tonneau Cover
Posted by Jane Anne (Douglas City, CA) / March 31, 20252022 Dodge Ram
5 of 5
Great for Work & Road Trips
Just picked up my new '25 ram and didn't want the bed looking like a storage bin. I often carry work equipment so need this cover to keep everything tucked away neatly instead of looking like a junkyard back there. Very easy to use, great overall.
UnderCover® TR36008 - Triad Hard Folding Tonneau Cover
Posted by User (Holbrook, AZ) / February 04, 20252025 Dodge Ram
5 of 5
OK
I do a lot of camping and this cover has been great for keeping stuff safe from the elements. Even in heavy rain the bed stays dry. Easy to fold when I need to haul bigger items and it feels secure when closed.
Posted by Anonymous (Seattle, WA) / December 21, 20242025 Chevy Silverado 2500
5 of 5
Great for Everyday Use
I got this cover for my 2024 Ranger. I love it! Keeps my groceries dry and my work tools secure. I like that I can fold it back when I need to carry bigger items, so it's really versatile. Didn't have any issues during setup.
Posted by Patrick (Denver, CO) / December 03, 20242024 Ford Ranger
2 of 5
Am I Missing Parts?
I believe that the bed cover is well made and will be durable for everything that I will use it for. However, there is a piece of trim that continues to shift during everyday driving that I have to push back into place almost daily. I'm not sure but it looks like there is something missing that holds it in place.
Posted by Customer / August 22, 20212014 Ford F-150
5 of 5
Love It
This was a great investment, it fits perfectly.
Posted by Kevin / May 26, 20202012 Toyota Tacoma
5 of 5
I Like It
It seems to work well. I like the folding options. It went on fairly easy, but the instructions could be better. Overall I like it and would buy it again.
Posted by Joe (Orange, TX) / June 28, 20192019 Ram 1500
5 of 5
Undercover Flex 2018 F150
I researched hours on hard covers. This seemed like the best choice. It was reasonably easy to install. Looks awesome. Functions very well. Light compared to the one I had on previous truck. I would buy it again. Company says it takes 3-5 day to build and ship. It came in a reasonable time. I would recommend having a second person to help with installation. Gary R. 2018 F150 Lariat short bed.
Posted by Gary W (Anderson, CA) / April 24, 20192015 Ford F-150
5 of 5
UnderCover
Arrived quickly, was as described and good price.
Posted by John (Richmond, TX) / March 09, 20192011 Ram 1500