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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
2017 GMC Terrain
$150 Online Rebate on Select RetraxPRO MX & XR Tonneau Covers.
Retrax

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

Part Number: RTX85ZR
In Stock
$2,149.99
Retail:$2,249.99
$1,999.99 after $150.00 Mail-In Rebate
Tonneau Cover
Not Confirmed to Fit

2017 GMC Terrain

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Product Images

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 RTX85ZR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (67)
  • Q & A (0)
  • Photos

Retrax Tonneau Cover - RTX85ZR

Highlights

  • Custom Fit for Your Vehicle: Secures to your truck bed with model-specific clamps and hardware
  • Hard Cover Keeps Everything Out: 1" thick aluminum locks with tailgate to secure your gear.
  • Full Bed Access Fast: Retracts into a compact canister so you can haul large items anytime.
  • Keeps Gear Dry: Weather stripping, foam seals, and drain tubes route water out of the bed.
  • Low-Profile Look: Rails sit just 1" above the bed for a sleek, streamlined appearance.
  • Built to Last: Matte black aluminum resists dents, scratches, and up to 500 lbs of weight.
Made in USA

Features to know about

Secure Cargo Year-Round: 1" Thick Aluminum Construction

If you’re tired of worrying about gear getting stolen or soaked, the RetraxPRO MX solves that with heavy-duty 1" thick aluminum slats that lock down tight. The matte black finish resists scratches and fading, so it stays looking good while keeping your bed protected from rain, snow, and curious hands. With a 500-lb evenly distributed weight capacity, it’s built to handle snow loads or heavy gear without buckling.

Pickup truck equipped with RetraxPRO MX matte black retractable tonneau cover showing sleek low-profile design.

Smooth Access Without Hassle: Sealed Ball-Bearing Rollers

Opening and closing this cover feels effortless thanks to its sealed ball-bearing rollers that glide along the side rails. There’s no need for lubrication, and there are no springs or hinges to freeze or wear out. The pop-up handle lets you slide the cover with one hand, and you can latch it anywhere along the rails to haul tall cargo at the back while keeping smaller items covered up front.

RetraxPRO MX tonneau cover showing pop-up handle in use for manual retracting and locking along the side rails.

Truck bed with RetraxPRO MX cover partially retracted to show adjustable lock-in-place feature along side rails.

Side-by-side image of RetraxPRO MX tonneau cover with open handle and exposed key lock showing unlocking process.

Keeps Cargo Dry and Clean: Weather Seals and Drain System

Bad weather doesn’t mean a wet bed. Weather stripping and foam seals line all sides to keep out moisture, snow, and dust. The cover even overlaps the tailgate to block water from sneaking in. Inside the canister, a water management system with two drain tubes channels away anything that gets in, so the stored cover stays dry and mildew-free.

Close-up of RetraxPRO MX bulkhead weather strip and foam seal for watertight truck bed protection.

Close-up of RetraxPRO MX canister drain tube showing water management system and bed drain routing.

Truck tailgate open with RetraxPRO MX tonneau cover closed showing independent operation of cover and tailgate.

Side-by-side photo of RetraxPRO MX tonneau cover with handle closed under flush protective lid for secure locking.

Full Bed Access in Seconds: Retractable Design

When you need the whole bed, the cover rolls smoothly into a compact, angled canister that takes up minimal space. The spiral track system inside keeps the slats from rubbing together, so the cover rolls cleanly without wear and tear. You can slide long gear right under the canister and enjoy full-bed use without removing the cover.

See-through image of RetraxPRO MX retractable cover rolled into canister showing internal spiral track system.

Angled view of RetraxPRO MX tonneau cover canister showing compact design with drain tube outlet.

Two people installing RetraxPRO MX tonneau cover canister on pickup truck bed demonstrating two-person installation process.

Low-Profile, Clean Look: Flush Fit Over Bed Rails

For anyone who likes a truck that looks as good as it works, this cover sits just 1" above the bed rails for a streamlined finish. The flush-mounted locking handle and overlapping top panel eliminate gaps and keep the lines smooth. It’s a simple, solid way to give your truck a finished, low-profile look that performs as tough as it appears.

Close-up of flush design on RetraxPRO MX tonneau cover showing seamless fit between cover and canister.

RetraxPRO MX tonneau cover shown installed over 5th-wheel hitch demonstrating clearance for towing setup.

Specs

Weight and Capacity

  • Weight capacity: 500 lbs evenly distributed

Dimensions

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

Cross-section diagram of the RetraxPRO MX retractable truck bed cover showing sealed ball-bearing roller mechanism for smooth operation.

Warranty

  • Limited lifetime warranty

Installation diagram for RetraxPRO MX retractable tonneau cover showing labeled parts and mounting hardware.

80378 Retrax RetraxPRO MX Hard Bed Cover - Retractable - Aluminum - Matte

Installation Details RTX85ZR Installation instructions

This Product Fits The Following Vehicles




Ratings & Reviews

4.6

67 reviews
Review sort icon
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.

by:

I love this cover. I had one on a different truck, but it had the rails that could be used for a bike, kayak or ladder rack. I thought I had purchased the same rails, but when received, found that it was not the same. I didn’t realize it until after I installed it. Wish I had noticed it earlier as the rails to replace are $500. Be certain you order carefully.



by:

I have owned this roll top truck bed cover for a year now and still absolutely love it. I've owned other similar ones over the past twenty five years and this one is and has been the best. Sturdy, solid and so far, maintenance free. It certainly more weather (water) resistant as well. It definitely was more expensive than the other covers I've purchased in the past but the bitterness of poor quality remain forever and the higher cost of something well made are soon forgotten as you use the product everyday. Highly recommend.



by:

My third Retrax. The fit and finish is on point. Nice job... Again!



by:

Easy installation. No problems after a year on my truck. Very satisfied with the purchase.



by:

Only had this cover for a few weeks but it so far.



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:

Very well built and easy to use, great product.



by:

Vert good quality. No failures despite repeated use.



by:

This cover looks amazing and rolls so smooth. No heavy trifold flipping. I have the 8’ bed and it works great.



by:

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.



by:

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:

I like the old latch system better.
The
wire loom for drains is not going to last long.



by:

Great quality very happy with this. Would recommend to anyone looking for a nice retractable cover.



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:

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.



by:

Quality product. Bought to protect and hide fifth wheel hitch. Does a great job!



by:

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!



by:

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:

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:

Received my order in a timely manner. It was an easy install. I’m 65 years old and was able to install by myself.



by:

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.



by:

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.



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See what our Experts say about this Retrax Tonneau Cover


Info for this part was:

Employee Wilson B
Updated by:
Wilson B
Employee Matthew S
Written by:
Matthew S
Employee Daron K
Edited by:
Daron K

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