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  1. Tonneau Cover
  2. Retrax
  3. Retractable - Manual
  4. Low Profile - Top of Bed Rails
  5. Aluminum
  6. Matte
THIS ITEM IS NOT A FIT FOR
2012 Mercedes-Benz Sprinter
etrailer Installation
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Retrax

RetraxPRO MX Hard Tonneau Cover - Retractable - Aluminum - Matte Black

In Stock
$2,399.99
Tonneau Cover
Not Confirmed to Fit

2012 Mercedes-Benz Sprinter

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etrailer Installation
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Retractable cover opens and closes manually with a pop-up, locking handle. That, paired with impact-resistant, 1" thick aluminum, will give you the best security for the cargo in your bed. Sleek, streamlined design complements your vehicle. Great Prices for the best tonneau cover from Retrax. RetraxPRO MX Hard Tonneau Cover - Retractable - Aluminum - Matte Black part number RTX56FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (75)
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Retrax Tonneau Cover

Highlights

  • Custom Fit for Your Vehicle: Secures to your truck bed with model-specific clamps and hardware
  • Keeps Gear Safe: 1" thick aluminum cover locks anywhere on the rails to secure cargo.
  • Full Bed Access: Retracts fully into a small canister, leaving room for large loads.
  • Stays Dry: Weather stripping, foam seals, and drain tubes keep out rain and dust.
  • Built to Last: Matte black aluminum resists dents, scratches, and fading.
  • Smooth, Easy Use: Sealed ball-bearing rollers glide without straps or springs.
Made in USA

Features to know about

Smooth Bed Access: Retractable Aluminum Design

The RetraxPRO MX opens and closes with a pop-up locking handle that slides easily along sealed ball-bearing rollers. There are no straps, snaps, or hinges to fight with, and it doesn’t need lubrication to stay smooth. You can secure it at any point along the rails to cover part of the bed while hauling taller gear in the back, or retract it fully in seconds for complete bed access. When rolled up, it stores neatly inside a canister with a spiral track system that keeps the slats from rubbing against each other and wearing out.

Close-up of RetraxPRO MX pop-up locking handle on the truck bed cover showing one-hand operation

Open view of RetraxPRO MX pop-up handle and key lock showing unlocking and sliding operation

RetraxPRO MX retractable bed cover latched partially open for partial cargo access

RetraxPRO MX retractable truck bed cover rolled into canister showing spiral track system that prevents wear

Angled view of RetraxPRO MX retractable cover canister showing sloped bottom for added cargo space

Strong Enough for Work and Weather: 1"-Thick Aluminum Slats

Built from 1-inch-thick, impact-resistant aluminum panels, this cover can handle 500 lbs of evenly distributed weight on top. It shrugs off dents, heavy snow, falling branches, and road debris. The matte black finish is scratch-resistant and won’t fade in the sun, so it keeps its clean look even after years outdoors. The rugged build makes it just as ready for jobsite hauling as it is for year-round weather protection.

Truck fitted with RetraxPRO MX matte black retractable cover showing sleek and durable aluminum design

Secure Storage: Locking Handle and Enclosed Design

When closed, the RetraxPRO MX turns the bed into a locked compartment. The flat, concealed locking handle sits flush and sealed under a protective lid to keep dirt and moisture out of the keyhole. Once latched, the cover can’t be lifted or cut open, and it works independently of the tailgate—so you can open one without touching the other. With the tailgate locked, your cargo stays hidden and protected from theft and the elements.

Closed and locked RetraxPRO MX tonneau cover showing concealed keyhole for theft and weather protection

Truck with tailgate open and RetraxPRO MX retractable cover closed, showing independent tailgate operation

Dry Cargo in Any Season: Weather Seals and Drain Tubes

Weather stripping and foam seals run along all sides to keep moisture, snow, and dust out. The cover overlaps the top of the tailgate to stop water from sneaking in at the back. Inside the canister, two drain tubes route any collected water through factory bed holes, so it doesn’t pool or cause mildew. Whether it’s rain, wash water, or melting snow, the system keeps everything under the cover dry and clean.

Close-up of RetraxPRO MX bulkhead weather seal showing foam and rubber strips for moisture protection

Close-up of RetraxPRO MX drain tube attached to canister for water drainage and moisture control

Clean Look, Simple Install: Low-Profile Clamp-On Rails

The side rails mount just 1 inch above the bed for a sleek, low-profile fit that lines up evenly with the canister and tailgate. Installation is straightforward—no drilling required. The rails clamp to the bed edges with included hardware and stay square without fuss. Once it’s in place, you get a flush fit that looks factory and doesn’t take up extra space in the bed.

RetraxPRO MX flush-mounted retractable cover showing seamless fit with truck bed and canister

RetraxPRO MX retractable cover installed over 5th-wheel hitch demonstrating clearance and compatibility

Two people installing RetraxPRO MX tonneau cover canister onto truck bed rails

Specs

Weight and Capacity

  • Weight capacity: 500 lbs evenly distributed

Dimensions

  • Canister dimensions: 13-1/2" deep x 12" tall

Warranty

  • Limited lifetime warranty

80335 Retrax RetraxPRO MX Hard Bed Cover - Retractable - Aluminum - Matte

Item # RTX56FR

Installation Details RTX56FR Installation instructions

This Product Fits The Following Vehicles




Ratings & Reviews

4.6

75 reviews
5 Stars
(58)
4 Stars
(12)
3 Stars
(2)
2 Stars
(1)
1 Star
(2)
Review Sort Icon
by:
2021 Ford Ranger
Excellent product. The retractable cover opens smoothly and easily, and it locks very securely. The installation instructions were very clear and easy to follow -- and there are some helpful videos Took me about 90 minutes to install. I'm very happy with this truck bed cover. It's not cheap, but it appears to be a well-made product.
by:
This product was very easy to install and is made of good quality. After having this on the truck for about a year it still works perfect and looks like new.
by:
dodge Ram Pickup
The instructions were definitely lacking—ended up finding a decent YouTube video. The box itself wouldn’t fit between the rails on the inner sides of the bed (see pics), so I had to use prybars to seat it past the rails.

Functionality: seems very solid once installed and rollers help it slide easily either direction. I’m not convinced it’ll hold much water out, but that’s partly due to the ram box hinges next to the tonneau rails, then not a lot of pressure between the tonneau and the top edge of the tailgate. I also had a $500 tonneau in the past with weather stripping along the front box to scrape debris from the top side of the tonneau as it retracts into the box at the front of the bed. This doesn’t have that, so it seems debris will accumulate inside the box and I’m not sure how easily it will be to clean inside the box.

Time will tell if this is worth the price tag, but it does feel very sturdy once installed.
Kate F. profile picture
Etrailer Expert

Kate F.

1/14/2026

Install looks great Jesse! We couldn’t agree more about the instructions. Honestly, unclear instructions are exactly why we started making our own install videos many moons ago, because seeing it done can make all the difference. It’s good to hear the cover feels solid and slides smoothly once installed. Your notes on water sealing and debris are fair, especially with RamBox-equipped beds and tailgate fitment. We appreciate you sharing your experience, and we hope it continues to serve you well over time.

by:
Received my order in a timely manner. It was an easy install. I’m 65 years old and was able to install by myself.
Kate F. profile picture
Etrailer Expert

Kate F.

6/25/2026

Well Mark, 65 is the new 30! The new cover looks great, I really appreciate you including the pictures as well =)

by:
2025 GMC Sierra 3500
I was hesitant to try a canister type roll up bed cover after only having hard covers or a soft roll up above bed cover before. I'm glad I did...

It still gets 5 stars because even though the box for the rails was damaged, no parts were missing and there were no dents or scratches on any of the pieces.

The install was easy, did it by myself in a couple of hours not rushing to get it done but working at a leisurely pace. The only time I needed help was to position it in place after the side rails were attached. The part that took the longest was measuring and adjusting the width between rails from the front to the back to get them within spec so the cover moves smoothly and easily with no binding. The instructions were easy to follow and it is simple to put together and install. Just take your time measuring between the rails and it will glide effortlessly.

I like the size of the canister, it doesn't take up much space at the front of the bed, even though it has 8ft to roll up. It seems as if it will be pretty water repellent with the rubber seals and gaskets. It rolls up easily and doesn't retract fast and slam into the canister. It also rolls out easily all the way to the tailgate. Unlike previous covers I have had, this one doesn't require the tailgate to be closed to work properly. The cover can be extended all the way to the tailgate and you can open and close the cover or tailgate independently of one another. I also chose this particular cover because it had the anywhere lock feature rather than only a few set locking points. The matte aluminum is a nice clean look, and it seems like it will be less prone to sagging in the middle as time goes by. This particular model sits just a little above the bed (the bed cover rails sit on top of the truck bed) but the canister isn't any higher than the rails or the cover itself when its open or closed. It looks seamless and clean.

It's only been a few days since install but as of now, I couldn't be happier having chosen this bed cover. And as always, etrailer makes the ordering process easy and worry free with their vehicle specific fit, fast shipping and fair prices.
Dennis profile picture

Dennis

10/12/2025

After about a year owning this cover, I still would buy it again. If you set it up right in the first place, it will work flawlessly. The locking mechanism still works great. The rolling part still works great. Aside from a solid cover, this is the most secure cover I have ever had. It does get some drips of water inside after washing the truck but its not enough to worry about, even if you had a bed full of stuff.

by:
2026 Ford F-450 Super Duty
This is a very sturdy tonneau cover and looks great on our 2026 Ford F-450. The materials and build quality are top-notch. The installation is straightforward, and I recommend you watch the video(s) prior to performing the installation. The unit is heavy, and you will need a strong helper. This is our first hard tonneau cover, and we are very pleased with our purchase.
by:
2026 Ford F-450 Super Duty
The shipment was supposed to be delivered yesterday, so I stayed home from work to receive it. I live on a busy street in St. Louis city, or a corner lot. The instructions were to deliver it around back to the garage door. It finally arrived after 9pm on the front steps, which are within 8 feet of the sidewalk. Good thing it's so heavy and it didn't "walk off".
by:
2026 Toyota Tundra
Should put actual installation instructions with the product inadition with the on line.Something was catching when attempting to operate. Semes to work ok after it broke free.
by:
2024 Ram 3500
Nice product. More difficult to get the rails attached than it should have been. Very glad I had 2 strong guys helping me.

Love the results.
Nick S. profile picture
Etrailer Expert

Nick S.

11/10/2025

It looks great on your truck! I am glad you were able to get it installed with a little help.

by:
Ram 3500
This was a really easy installation. 2026 GMC 3500 DRW. I did it the install myself pretty quickly (except for lifting the combined rail/cover into the truck). One person on each side to guide and lift while my daughter lifted the weight in the middle of the bed worked well. The few connection screws required fit easily. Seals at the front of the truck and on the tailgate are smooth and complete. I didn't make both sides parallel when first installed. I loosened the middle and tailgate ends of the rails, adjusted the spacing distances, and it's perfectly in align now. One person can very easily expand and contract the top. The two drain hoses won't fit the holes in the truck bed. I'll pickup something from Home Depot or Lowes to append a reducing method. I really like this bed cover!
Nick S. profile picture
Etrailer Expert

Nick S.

12/1/2025

That is great to hear! I am glad you were able to get this installed easily with a little bit of help. I am sure you will like this cover over time. Are you using that new truck to tow anything?

Michael profile picture

Michael

12/1/2025

@NickS Grand Design Solitude 380FL. Bought a B&W hitch and full width mudflaps from eTrailer as well. Installing them next.
Nick S. profile picture
Etrailer Expert

Nick S.

12/2/2025

@Michael That is awesome! You'll have to let me know how those work as well.
by:
2026 Ram 3500
Quality product. Bought to protect and hide fifth wheel hitch. Does a great job!
by:
The tonneau works well. I wanted something that would be pretty secure (aluminum and locking) and easy to open/close. It is all those things! One handed open/close. Few pieces that are below the cover level so it doesn't interfere too much with what you have in the bed. Install was ok - definitely two people are easier than one.
Two downsides. The roll up area does take bed space - more than I'd like. Also, it is not watertight. Not terrible in the rain, but a good downpour or car wash gets water in the bed.
Laura970 profile picture

Laura970

9/8/2025

So on the plus side, love how it opens all the way up. When were loading the bed for travel, I need it fully open. Downside is the amount of room the canister takes up and the water as previously mentioned. Still quite easy to use!

Nick S. profile picture
Etrailer Expert

Nick S.

9/9/2025

@Laura970 I am glad it is working well for you on some aspects. I am wondering if the weather stripping or seal is bad. Have you noticed certain areas where the water leaks in more than others or is it pretty difficult to tell when it rains?
by:
2001 Dodge Ram Pickup
On my previous truck, we had installed a soft snap-on tonneau cover. While it looked great, its performance over time decreased significantly, particularly in cold weather! So this time around, I decided to splurge and purchase a high-quality roll-top hard cover. I am SO HAPPY that I did! As importantly as its ease of installation and use, it is lockable so I will no longer have sleepless nights while traveling, worrying about the items in the truck bed. eTrailer was a great help in expediting the delivery of this item, as my HOA requires pickup trucks to have their beds covered... Thank You!
by:
2022 Ford F-350 Super Duty
It’s seems high quality but this review is too soon to tell . I would rather give reviews after a few years of use but for now the product seem exceptional. It was just I stalled today.
by:
Easy enough to install and looks good. Works as I’d hoped and just need to see how it holds up in the Midwest winters ??
by:
Item came on time and was very easy to install, but you need somebody to help you lift and put in the back of the truck as instructed. Its not that heavy, but just too awkward for one person to lift and place.
by:
Great quality very happy with this. Would recommend to anyone looking for a nice retractable cover.
by:
2025 GMC Sierra 2500
I like the old latch system better.
The
wire loom for drains is not going to last long.
by:
2026 Ram 3500
This cover looks amazing and rolls so smooth. No heavy trifold flipping. I have the 8’ bed and it works great.
by:
Vert good quality. No failures despite repeated use.
by:
2020 Ford F-250 Super Duty
Very well built and easy to use, great product.
by:
I had some damage. It was a dent in the main box. I went ahead and used it anyway. I didn’t call or ask for return because I needed the cover right away and I messed the box up which would make the return hard to do. This was not etrailers fault. It was a packing issue from Retrax.
by:
The RetraxPRO MX Hard Tonneau Cover was very easy to assemble and install. Item was packaged very well for shipping. I would recommend this tonneau cover.
by:
2020 Ford F-250 Super Duty
Only had this cover for a few weeks but it so far.
by:
Easy installation. No problems after a year on my truck. Very satisfied with the purchase.
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See what our Experts say about this Retrax Tonneau Cover

  • Will a Yakima OverHaul HD Adjustable Truck Bed Ladder Rack Work w/ a RetraxPro Tonneau Cover?
    Hey Matt, welcome back. So long as you have a RetraxPro XR like item # RTT-60335, the Yakima OverHaul HD Adjustable Truck Bed Ladder Rack w/ Tonneau Cover Adapters item # Y01151-5955 will indeed work. However, if you have a RetraxPro MX like item # RTX56FR it won't because you don't have the t-slots. Please note that the Yakima OverHaul HD Adjustable Truck Bed Ladder Rack w/ Tonneau Cover Adapters item # Y01151-5755 is the correct ladder rack for a 2021 Ford Ranger. This has 60" crossbars...
    view full answer...
  • Retractable vs. Folding Hard Tonneau Cover For 2021 Ford Ranger
    That's a good question as there are a few key differences between the retractable hard tonneau covers and the folding hard tonneau covers for your 2021 Ford Ranger. The biggest differences are ease of use, security, and how they impact your bed size. First, here are the part numbers for the RetraxPRO MX and BAKFlip MX4 that fit your 2021 Ford Ranger, depending on its bed size: - RetraxPRO MX Hard Tonneau Cover - Retractable - 5' Bed # RTX56FR or 6' Bed # RTX36FR - BAKFlip MX4 Hard Tonneau...
    view full answer...

Do you have a question about this Tonneau Cover?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jacob T
Video by:
Jacob T
Employee Wilson B
Updated by:
Wilson B
Employee Mark S
Written by:
Mark S
Employee Ryan G
Installed by:
Ryan G

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