Manufacturer | Undercover |
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Brand | UNDERCOVER |
Model | FX21019 |
Item Weight | 50 pounds |
Product Dimensions | 28 x 68 x 8 inches |
Item model number | FX21019 |
Is Discontinued By Manufacturer | No |
Exterior | Smooth |
Manufacturer Part Number | FX21019 |
OEM Part Number | FX21019 |
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UnderCover Flex Hard Folding Truck Bed Tonneau Cover | FX21019 | Fits 2015 - 2020 Ford F-150 5' 7" Bed (67.1")
Delivery & Support
Select to learn moreCFD Diesel Performance
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Purchase options and add-ons
Brand | UNDERCOVER |
Style | 2015 - 2020 |
Exterior Finish | Smooth |
Material | Aluminum |
Lock Type | Tailgate |
About this item
- Fits 2015 - 2020 Ford F-150 5' 7" Bed (67.1")
- 100% BED ACCESS | The Flex allows you to drive with the cover in three secure positions: closed, partially closed, & fully open. The cover folds into an upright position with dual prop rods, without resting on the back of the cab.
- STYLISH LOW PROFILE DESIGN | The Flex hard folding cover has a gloss black finish and lies flush with the truck bed to enhance the appearance of your truck. It also features full perimeter seals to help prevent water intrusion.
- EASY OPERATION | This cover has durable, aluminum automatic-latching panels that release with pull cables on either side of the truck. The dual-action tailgate seal allows you to shut the tailgate without lifting the cover first.
- PURCHASE WITH CONFIDENCE | The UnderCover Flex hard folding tonneau is lightweight & easy to install. It comes with a 3-year, hassle-free guarantee, is made in the USA with globally sourced materials, & is backed by a US-based customer support team.
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This Item UnderCover Flex Hard Folding Truck Bed Tonneau Cover | FX21019 | Fits 2015 - 2020 Ford F-150 5' 7" Bed (67.1") | Recommendations | dummy | dummy | dummy | dummy | |
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Price | -8% $1,005.99$1,005.99 List: $1,098.99 | $499.95$499.95 | $1,139.00$1,139.00 | $539.99$539.99 | $1,199.99$1,199.99 | -16% $649.00$649.00 List: $769.99 |
Delivery | Get it Mar 25 - 27 | Get it Mar 26 - 28 | Get it as soon as Monday, Mar 25 | Get it as soon as Monday, Mar 25 | Get it as soon as Monday, Mar 25 | Get it Tuesday, Mar 26 |
Customer Ratings | ||||||
Easy to install | 4.5 | 4.7 | 4.5 | 4.5 | 4.5 | 4.3 |
Value for money | 4.2 | 4.7 | 3.6 | 4.6 | 4.2 | 4.1 |
Weatherproof | 4.3 | 4.4 | 4.3 | — | 4.3 | 4.7 |
Water resistance | 4.3 | — | 4.2 | — | 4.3 | — |
Mileage | — | — | 4.3 | 4.2 | — | 4.0 |
Sold By | CFD Diesel Performance | TRUCKPRO | Amazon.com | Truck Gear Warehouse | Amazon.com | Amazon.com |
size | 5' 7" Bed | — | 5' 7" Bed | 5'5"Bed (66") | 5' 7" Bed | 5' 7" Bed |
lock type | Tailgate | Tailgate | Tailgate | Tailgate | Tailgate | Tailgate |
material | Aluminum | Polypropylene | Aluminum | Polypropylene, Aluminum | Aluminum | Aluminum |
exterior finish | Smooth | Aluminum | Painted | Aluminum | Black | Aluminum |
style | 2015 - 2020 | Folding | 2021 - 2022 | Folding | 2015 - 2020 | Gator EFX | Hard Tri-Fold |
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Important information
Safety Information
On Product Combined Cancer and Reproductive
From the brand
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Painted to match, one piece and tri-folding hard top truck bed covers designed to deliver a premium appearance with long-lasting protection.
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From the manufacturer
UnderCover Flex
Made In the USA with globally sourced materials.
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The UnderCover Flex is a hard folding truck bed cover that gives you the ultimate control of your truck bed. Offering three secure riding positions, the cover is easy to remove, requires no drilling for installation, and is mounted flush with your truck's bed rails. |
Each panel is made of high quality FRP composite material; which is lighter, stronger, and more dent resistant than aluminum. |
Built-in prop rods secure the cover in the open position allowing your truck to be driven with the cover fully open. |
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Flex offers you three secure driving positions; Closed, to completely cover all of your cargo, Folded up, laying flat, toward the cab, or folded upright, at a 90 degree angle, for 100% Bed Access. |
Each Flex has a bed rail mounting system that is equipped with rubber seals and drain tubes to carry water away from and out of the bed, keeping your gear dry and secure. |
Easy-to-use slam latches are mounted on both sides of the cover and allow the cover to be opened from either side of the truck. |
Product Description
The UnderCover Flex hard folding truck bed cover comes in a gloss black finish and lies flush with the truck bed. The Flex hard folding cover allows you to drive with the cover partially or fully open, providing 100% bed access when you need to transport large items that stick out of the bed. When fully open, the Flex is secured in an upright position with dual prop rods that lock into place and stow away easily when not in use. The Flex provides the ultimate security, with durable aluminum panels and an automatic latching system that locks the cover into the bed’s side rails. The latches are easily released with multiple pull handles underneath the cover, on either side of the bed, so you can effortlessly open the cover from either side of the truck. The Flex is also extremely functional, with a dual-action tailgate seal that enables you to close the tailgate without having to lift the cover first. The Flex is proudly made in the USA with a US-based customer support team and it comes backed by a 3-year, hassle-free guarantee. The Flex provides the ultimate security, with durable aluminum panels and an automatic latching system that locks the cover into the bed’s side rails. The latches are easily released with multiple pull handles underneath the cover, on either side of the bed, so you can effortless open the cover no matter what side of the truck you happen to be on. The Flex is also extremely functional, with a dual-action tailgate seal that enables you to close the tailgate without having to lift the cover first. The Flex is proudly made in the USA with a US-based customer support team and it comes backed by a 3-year, hassle-free warranty.
Product information
Technical Details
Additional Information
ASIN | B016YKFEIW |
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Customer Reviews |
4.5 out of 5 stars |
Best Sellers Rank | #126,399 in Automotive (See Top 100 in Automotive) #296 in Truck Tonneau Covers |
Date First Available | December 24, 2014 |
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the ease of installation using the tonneau cover. They mention that the instructions are straight forward and simple. They also appreciate the cover's appearance, saying that it looks pretty good and well designed. They praise the cover for being of the highest quality construction. Customers are also happy with the fit, saying it fits perfectly. They are satisfied with performance, and weather resistance. However, some customers have reported issues with the seal, mentioning that it leaks at panel seams.
AI-generated from the text of customer reviews
Customers find the installation of the tonneau cover pretty easy. They say the instructions are straightforward and simple. Some mention that the installation went smooth.
"...It was easy to install - took me about 30 minutes using a socket wrench, and I have a bed liner...." Read more
"...Setup was a breeze, once I paid slight attention to the instructions for where the clamps are supposed to attach to the rails...." Read more
"...Installation went fairly easy. I watched the video on their site first which explained everything a lot better than the written directions...." Read more
"...The instructions are straight forward but I also looked at a few online installation videos. The first time, it took my about an 1 hour...." Read more
Customers are satisfied with the appearance of the tonneau cover. They mention it looks pretty good, is well designed, and has a clean, flush look. Some say that the cover is perfect and matches the stock plastics well.
"...It looks good, fits perfectly, mine doesn't leak - even without the drain tubes and the weatherstripping installed (some have said theirs did), and..." Read more
"...All looks good especially the hardware straps and latches. Very nice. Both rails have end caps so the install looks very clean...." Read more
"...So perfect fit.Love the look with it being flush. It is more expensive than some others but the quality is there...." Read more
"...Step descriptions were a bit unclear at times. The cover itself is good and I installed by myself in about 30 minutes...." Read more
Customers like the quality of the tonneau cover. They mention it's solid, secure, and well worth the added cost. Some say that it has good features and is easy to install.
"...They attach and detach very easily and seem to hold up well. I have not used the cover in the upright position while driving...." Read more
"...I won't leave anything valuable in the back. It is secure enough to keep out people just walking by, but you could easily pop open any of these..." Read more
"...The cover in general gives a clean, flush look and is definitely worth the money...." Read more
"...a lot of covers at a local shop and found this to be the highest quality construction among the major brands...." Read more
Customers like the fit of the tonneau cover. They say it's easy to align and adjust, and it fits perfectly the first time.
"...It looks good, fits perfectly, mine doesn't leak - even without the drain tubes and the weatherstripping installed (some have said theirs did), and..." Read more
"...I really had no alignment issues that other users had. It lined up perfectly the first time. Just put the rails flush against the back of the bed...." Read more
"...All my own problems aside this is a very well made cover and fits perfectly and sits below the truck bed which is what I wanted...." Read more
"...150 - thought I loved it but the armor flex was easier to install, fits better and looks way better" Read more
Customers are satisfied with the performance of the tonneau cover. They mention that it works well, does a good job of protecting the contents of their truck bed, and has no issues or extra noise. Some say that the product is amazing and the installed drain tubes work as designed.
"...It works great, is sturdy, flexible, and no issues with quality - with the exception of the plastic pieces...." Read more
"...I installed the drain tubes at the cab-end of the bed, and they have worked great...." Read more
"...design consideration of the drain tubes to help keep the bed dry -- nice work!..." Read more
"...ran water hose over cover to check for leaks and the installed drain tubes working as designed. I used the holes near top of sidewall of the bed...." Read more
Customers like the weather resistance of the tonneau cover. For example, they say it's completely weatherproof, keeps things secure, and dry. Some say that it does secure it from the elements. However, some customers mention that it protects camping gear from wind and weather.
"The product was pretty well packaged and protected, had all the necessary accessories and very good precise instructions with pictures, obviously..." Read more
"...I don't consider it a big deal because it works well to keep out water.It is not water tight but it is pretty close...." Read more
"...how it looks on my 2020 F150 FX4 along with the fact it keeps bed contents secure/dry...." Read more
"...stuff on road trips, kiddo sports games out of town, and has kept the weather out! I have absolutely loved the bed cover, and highly recommend it!..." Read more
Customers are dissatisfied with the seal of the tonneau cover. They say that it leaks at the panel seams and fold between panels. They also mention that there's no way to seal the back of the cover to the tailgate in the corners of the rails. Additionally, customers say that the cover doesn't prevent water from getting into the truck bed.
"...It is not water tight but it is pretty close. After torrential rains and snow, it has been bone dry...." Read more
"...But... I have to say that it has leaked since the first rain storm after I bought it.It's frustrating, because it is not cheap...." Read more
"...and you'll see too far back it wont close right and too far forward wont engage the seals. It looks too short but it does cover properly...." Read more
"...It looks good, fits perfectly, mine doesn't leak - even without the drain tubes and the weatherstripping installed (some have said theirs did), and..." Read more
Customers are dissatisfied with the scratch resistance of the tonneau cover. They mention that it arrived scratched, damaged, and with dents. Some reviewers also mention that the hinges leave dents in the outside of the cover.
"Pictures show damages on two different covers. The first one arrived scratched, I’m usually not that picky but when spending over $1,000 on an item..." Read more
"...Unfortunately, when packaged, the hinges leave dents in the outside of the cover...." Read more
"...I’d buy it again, it’s tough, scratch resistant and looks great." Read more
"...It did come damaged, one of the drain tube connections is broken and one of the brace holders was broken also...." Read more
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Top reviews from the United States
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It was easy to install - took me about 30 minutes using a socket wrench, and I have a bed liner. It looks good, fits perfectly, mine doesn't leak - even without the drain tubes and the weatherstripping installed (some have said theirs did), and in general it works great. I even drove it on the freeway once with all but the last panel open - no issues and no extra noise. As a test I fully opened all of the panels and used the hydraulic lifts to hold up the panels, which was easy to connect. I have not driven with the panels fully in the up position so I don't know how well that works yet. I love the Line-X coating on the top side of the panels, I didn't want a glossy black finish and it feels durable. Tailgate opens and closes with no issues.
There are two minor issues I have with it after a month of use:
1. the latches sometimes don't fully click in unless I pound down on the corners
2. one of the plastic storage clips for the hydraulic lift supports came broken so it just dangles when not in use. I'm thinking of using a strong magnet or a nylon strap to hold it in place, but haven't attempted anything yet.
Gave it 5 stars because I would 100% buy this cover again and the issues I mentioned above are minor IMO
4/22/2020 Update
After using this cover for almost a year and a half I would still buy it again. The latching issue I had initially was solved by unscrewing the clip that was having an issue and adjusting it for better coverage. It works great, is sturdy, flexible, and no issues with quality - with the exception of the plastic pieces. It came with one broken hydraulic lift clip, then about 3 months ago the other one broke. At about 6 months in one of the clips at the back of the bed for when the cover is open broke as well. Fortunately using only one still works but if that one breaks then I'm kind of screwed. I tried to find replacement parts on their website but couldn't find anything. I may try calling them to see if I get anywhere with that. Other than that, I'm still very happy with it.
The Line-x lining on the top of the cover puts it into a much higher tier for durability and protection compared to its sticker price. While I did not actively test the durability, a 3,000 mile recent road trip through 100F temps and now/ice did nothing to damage this unit.
Setup was a breeze, once I paid slight attention to the instructions for where the clamps are supposed to attach to the rails. Had I not been foolish, complete install (including slight angle adjustments) only took me 10 minutes.
As far as water protection from the interior, I installed the drain tubes at the cab-end of the bed, and they have worked great. Having put the cover through the ringer from pressure washing, commercial drive-thru car washes, and multiple 6" snowstorms here in Colorado, there is only minimal water buildup right by the tailgate, and it is only 1-2 oz--nothing major. This is more than likely from the gaps in the truck bed to the tailgate than from a defect in the tonneau cover.
The folding functionality of the cover is very simple, and the cable to release the lock for each panel is accessible from both the left and right side for ease of use while standing outside the truck. The dual arms to hold the cover up vertically are a little tight to connect the first few times you use them, but I'm taking that as a good sign for long-term use. They attach and detach very easily and seem to hold up well. I have not used the cover in the upright position while driving.
There have been comments about tonneau covers rattling while driving on the freeway at higher speeds, and I can say I've yet to experience this. Driving through Western Utah with speed limits of 80 mph, there was no noise from the cover whatsoever.
Overall, I couldn't be more pleased with the unit. I was very hesitant to get a folding cover and wanted the premium experience of the sliding/canister models. However, the $2k price tag for many of these just was not worth it in my mind, especially for a truck with a shorter truck bed. The Undercover ArmorFlex has done everything I've asked of it and more. I definitely recommend this to anyone interested, you won't be disappointed. Just maybe keep an eye out for when they go on sale for an even better value.
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Update - my replacement parts are here and installed. I like this tonneau cover!
Edit: After an issue with a screw breaking on a rail, they were excellent as far as responsiveness and resolving the problem. MUCH APPRECIATED!!