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UnderCover Flex Hard Fold Tonneau Cover

100% of 100
Special Price Regular Price 869.00
In stock

Tonneau Cover Coupons ToughAutoParts

The UnderCover Flex Hard Tri Foldis a hard folding tonneau cover that gives you the ultimate control of your truck bed, offering three secure riding positions. The cover is easy to remove, requires no drill for installation, and is mounted flush with your trucks bed rails making it the most water-tight hard folding cover on the market. Each panel is made of high quality FRP composite material; which is lighter, stronger, and more dent resistant than aluminum. Each Flex Hard Tri Foldhas a bed rail mounting system equipped with rubber seals and drain tubes that carry water away from, and out of the bed, keeping your gear dry and secure. Best yet Flex Hard Tri Foldis backed by a 3 year warranty slowly making it Americas favorite hard folding tonneau cover.

IMPORTANT NOTE: If Vehicle has Headache Rack installed, an Inside Rail Mount Tonneau Cover can be used with no additional parts. If a Top Mount Tonneau Cover is desired, an Installation Kit may be needed. To find Installation Kit, look up by Supplier for Headache Rack.

Bed Side Rail MountInside Bed Mount
MaterialFiberglass Reinforced Polymer
Installation TypeClamp-On
Used With Tool BoxNo
Used With Ladder RackNo
Used With Bed CapsYes
Used With Bed RailsYes
Includes Ladder RackNo
Locking TypeNon-Lockable
Drilling RequiredNo
Color GroupBlack

  • Panels Automatically Latch To The Covers Mountings Rails, Making It Simple To Operate From Either Side Of Your Truck
  • Secure Design, Plastic Buckles And Straps Are Included To Secure The Panels In The Partially Open Position
  • Low Profile, Ultra Low Profile Design Rests Inside The Bed Rails Allowing For A Very Sleek Look. FRP Composite Panels: Lighter, Stronger And Higher Dent Resistance Than Aluminum
  • Full Access: Built-In Prop Rods Secure The Cover Allowing Your Truck To Be Driven With The Cover Fully Open. Weather Resistant: Rubber Seals And Drain Tubes Channel Water Away From And Out Of The Bed
  • Prop Rods, Prop Rods Conveniently Stow In Rubber Coated Clips
  • Easy Removal: Entire Cover Can Be Removed In Seconds With No Tools Needed
  • No Drill Install: Clamp-On, No Drill Installation
  • Limited 3 Year Warranty

Frequently Asked questions regarding Flex

Q: Is the Flex waterproof?

A: The Flex is weather resistant. The Flex utilizes rail channels and drain tubes to move water away from the bed. Ultimately, no folding cover is completely waterproof as there are tailgate gaps and other areas that may allow some intrusion.

Q: What is the install time on the Flex?

A: The Flex can usually be installed in about 45 minutes

Q: Can I drive with the cover in the upright position?

A: Yes. The Flex utilizes strut mounts to stabilize the cover while driving.

Q: Will the cover work with a 5th wheel hitch?

A: Yes. There are two available cover positions while pulling a 5th wheel. Upright and ¾ bed access.

Q: How fast can I drive with the cover in the upright position?

A: We do not assign a speed rating to the Flex in the upright position, but it is well equipped to handle legal interstate speeds.

Q: What is the warranty on the Flex?

A: 3 Years on workmanship and materials. 1 year on hardware.

Q: Can I see out the back window with my Flex fully upright?

A: No. The cover in the upright position will block the view out the back window.

Q: How easy is it to remove my Flex cover?

A: Simply unscrew the two elevator bolts and lift!

Q: How can I get the side seals to lay flat on my new Flex?

A: After a day or two, direct sunlight will be absorbed and help the seals lay flat.

Q: Do I need to drill into my truck when installing the Flex?

A: No. The Flex utilizes clamps and a no-drill installation.

Q: Does my Flex work with a standard toolbox?

A: No. Flex cannot be installed with a toolbox.

Q: How secure is my Flex cover?

A: The Flex secures your cargo with the help of a tailgate lock. The only access point is the pull cord underneath to open the cover. If your tailgate is locked, your cover is locked.

Q: Where is the Flex made?

A: All UnderCover products are proudly made in the USA.

Q: Is the Flex compatible with my bedliner?

A: Yes. The Flex will work with BedRug, spray-ins and any under the rail bedliner. Flex is also compatible with many aftermarket bed caps.

More Information
Material FRP
Warranty 3 Years
Style Hard Tri-Fold
Mounting Standard Rail System
Truck Bed Style Hard Tri-Fold
Customer Reviews
Most Helpful Customer Reviews
  1. 100%
    A Must have



    I purchased the Undercover Flex Hard Fold from and happy with the service they provided. They were not always about selling like other big companies. They were nice enough to help me find the right product that was suitable for my needs. I recommend ToughAutoParts and Undercover Flex Hard fold tonneau cover from them. If you are looking for secure tonneau cover this cover is a must for your truck bed.
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  2. 100%
    Excellent cover



    I ordered this for my GMC truck and was very happy with the ease of transaction and on time delivery. Installing the cover was easy and it looks great as well. The tailgate and cover align properly unlike few that I had owned before. I think UnderCover has done an excellent job with building this UnderCover Flex cover.
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  3. 100%
    Very knowledgeable customer service



    Very knowledgeable customer service rep. they were able to help me find the product that fits my truck and gets the job done right. I am very happy with the purchase of this Undercover Flex.
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