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Thule TracRac SR Sliding Truck Bed Ladder Rack w/ Cantilever - 1,250 lbs

Thule TracRac SR Sliding Truck Bed Ladder Rack w/ Cantilever - 1,250 lbs

Item # TH43003XT-510EX
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This versatile, sliding ladder rack adjusts along the length of your truck bed and easily removes from the included T-track base rails. Over-the-cab extension lets you carry long pipes, lumber, and more. Lightweight, rustproof aluminum construction. Fastest Shipping and Guaranteed Lowest Prices for Thule TracRac SR Sliding Truck Bed Ladder Rack w/ Cantilever - 1,250 lbs. Read our customer reviews of Thule ladder racks. Call 800-298-8924 for expert service or order your ladder racks part number TH43003XT-510EX by Thule online at etrailer.com.
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  • Reviews (21)
  • Q & A (6)
  • Videos (1)
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Thule Ladder Racks - TH43003XT-510EX

  • Thule
  • Truck Bed
  • Sliding Rack
  • Over the Cab
  • Aluminum
  • No-Drill Application
  • Fixed Height
  • 3 Bar
  • Extra Heavy Duty

This versatile, sliding ladder rack adjusts along the length of your truck bed and easily removes from the included T-track base rails. Over-the-cab extension lets you carry long pipes, lumber, and more. Lightweight, rustproof aluminum construction.


  • Adjustable ladder rack slides in unique, T-track base rails along the full length of your vehicle's bed
    • Perfect for long loads, short loads, and everything in between
    • Integrated, quick-release clamping knobs can be loosened to move rack, tightened to secure it in place
    • Rack can be removed from track quickly and easily
  • Aerodynamic design reduces drag and wind noise
    • Elliptical crossbars are streamlined to minimize wind resistance
    • Airfoil trip strips prevent air from whistling through slots
  • Cantilever extension provides additional support for long loads
    • Attaches to crossbar to add 32" of length to rack
    • Sits over the cab of your truck
    • Removes easily for a more compact ladder rack
  • 6000-Series aluminum construction is strong and durable
    • Lightweight material won't detract from load rating
    • Internal web structure of crossbars increases strength and rigidity
  • Dual-stage powder coat finish adds extra rust protection
    • E-coat is followed by a clear coat for improved resistance to scratches
  • 4 Heavy-duty, aluminum load stops included - keep ladders, lumber, and other cargo in place
    • Mount quickly and easily in top slots of crossbars
    • Slide within slots to adjust
    • Lock in place with simple twist of a knob
  • 4 Side cleats attach to uprights for additional tie-down options
  • No-drill installation - mounts in stake pockets
  • Wide base on either side of each upright provides superior stability - no need for additional bracing
  • Made in the USA


  • Carrying capacity: 1,250 lbs
    • Capacity of cantilever extension: 1,000 lbs
  • Crossbar length: 69-1/2"
  • Rack height (with base rails): 28-15/16"
  • Limited lifetime warranty

TracRac Base Rails

TracRac SR Sliding Rack Base Rails

The TracRac base rails provide the foundation for this unique, customizable system. No-drill, stake-pocket installation yields securely mounted rails that sit atop your factory side rails. Each rail has 2 tracks for maximum adjustability.

TracRac Sliding Rack

Because the rack section at the front of your truck bed mounts to a different T-track than the one in the rear, the sections can be moved so that they are right next to each other. The result is unobstructed access to your truck bed and improved aerodynamics when you are not using the rack.

TracRac offers accessories that are designed to mount in these tracks. Base rail tie-downs (sold separately) give you additional cargo-management options. These rustproof, aluminum tie-downs slide across the rails for optimal placement and are secured in place with the turn of a knob.

Cantilever Over-the-Cab Extension

TracRac Cantilever Over-the-Cab Extension

Included with your TracRac system is the cantilever extension, which attaches to the front crossbar to provide 32" of additional length over the cab of your vehicle. With this extension piece mounted you can carry long loads safely and easily. The crossbar of the cantilever extension is constructed in the same fashion as the other TracRac crossbars so that you get the same sturdy, aerodynamic styling throughout.

TracRac Slotted Crossbars

The sturdy aluminum crossbars on all TracRac truck racks feature integrated slots for mounting and easily adjusting accessories, such as the included load stops. These slots appear on both the top and bottom of the bars for the ultimate in mounting versatility. Like the pieces that mount in the base rails, these accessories also have quick-release knobs that let you loosen and tighten them with a mere twist of a knob so that they can be positioned as needed along the bars.

A built-in trip strip at the front of each crossbar shields the slots from wind, maintaining the aerodynamic quality of the bars and preventing that annoying whistle you often find with slotted bars.

Included Tie-Downs

TracRac Load Stop Accessories

Included with your TracRac SR are 8 tie-down accessories. The 4 load stops are designed to mount in the slots of the crossbars and slide along them for quick, easy adjustment. These bookend-style pieces help to hold ladders and lumber in place on the crossbars. They also have built-in loops for securing tie-down straps.

TracRac ARC Side Cleats

The 4 cleats attach at any of the provided mounting points along the outsides of the upright supports so that you can tie down items that require additional anchoring or that sit in your truck bed.

Sturdy, Rustproof Construction

The TracRac base rails and rack system, as well as most TracRac accessories, are constructed of durable, lightweight aluminum. Because aluminum is lighter than steel - the material most often used for truck racks - only a small percentage of your truck's cargo capacity is taken up by the rack itself, enabling you to pack on more weight than you could with a steel system.

Even though aluminum is already rustproof in itself, TracRac has taken the extra step of adding a dual powder coat finish to further protect your rack. The electrostatic powder coat (e-coat) clings to the metal surface better than traditional paint finishes for a more durable covering. The second coat is a clear finish that adds extra shine and protection from scuffs and scratches.

43003 Thule Track Rack SR Sliding, Overhead Rack

21510 Thule Track Rack Base Rail SDS - Short Bed Ford Super Duty Trucks

24002 Thule Track Rack Cantilever Over-the-Cab Extension - Full Size

Replaces TracRac TA21510-03-02

TH43003XT-510EX Installation InstructionsInstallation Details TH43003XT-510EX Installation instructionsTH43003XT-510EX Installation InstructionsAlternate Instructions TH43003XT-510EX Installation instructions

This Product Fits The Following Vehicles

1999 - 2014 Ford F-250 and F-350 Super Duty 6-3/4 Foot Bed

2015 - 2016 Ford F-250 Super Duty 6-3/4 Foot Bed

2015 - 2016 Ford F-350 Super Duty 6-3/4 Foot Bed

Video of Thule TracRac SR Sliding Truck Bed Ladder Rack w/ Cantilever - 1,250 lbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Thule TracRac SR Sliding Truck Bed Ladder Rack Review

Today we're gonna be checkin' out Thule TracRac SR Sliding Truck Bed Ladder Rack with Cantilever.With this system you get way more than your traditional ladder rack. You get an abundance of features and you get more loading space. The included cantilever extends over the roof of your truck, expanding the amount of storage space available.The cantilever extends 32" from your front rail. You'll get a whopping 1,250 pounds carrying capacity distributed evenly across your rack. If you're using your cantilever up there, it does reduce it down to 1,000 pounds but that's still plenty of space and carrying capacity for anything you throw up there.We've currently got ladders up on our rack, but with it's massive carrying capacity, you could put lumber, steel, PVC pipes, and just about anything and secure it tightly with the load stops found on each corner.Now with the ladders removed, I'll show you it's coolest feature. The tops will slide individually from one another, allowing you to collapse it down and get the maximum use out of your truck bed when you need that vertical space or you could adjust it for shorter ladders and loads, while still maintaining half of your truck bed for taller objects.This is unlike other ladder racks that are set in a fixed position which require you to remove them completely if you need full truck bed access.

This one can simply collapse in on itself when you don't need the ladder rack function.It easily slides once you've loosened the levers. You are gonna want to push from the center. The dual track design allows the system to collapse in on itself and you can simply tighten down the locking knobs and it'll stay in place. There are stopper bolts on each rail and each corner to keep it from sliding too far forward or too far off the backside.Each post has a tie-down cleat on it to allow you to more easily secure the loads on top and what I like about this, it's kind of nice, you could slide this closer together and you could even use these for fishing rods or something else.The load stops on top also have anchor points in them so you can secure your load tightly to those. The load stops are also adjustable.

By loosening the knob, you can set the distance between the two. Each one is adjustable so you can position the load wherever you'd like. If you want to have it staggered off to one side, in the center, or one wide load. Once you find the spot you want 'em, you simply secure it down.And since it does use the Thule T track system, you can use your other accessories with it like your bike racks or cargo carriers, as long as they use T slots.The crossbar at the front of our cantilever also uses Thule T slots. The crossbars are gonna measure about 69 1/2" and they're gonna sit off of your truck bed rails about 29".The entire ladder rack itself is gonna be constructed of aluminum so it's going to be rustproof and lightweight.

This makes it really easy to adjust it on sliding rails, due to the lower weight and for further protection. Thule went ahead and put a double powder coat on it to further fight against corrosion.The base rails are going to be the heart and soul of our ladder rack. This component is gonna be custom fit to work with your truck and there's no drilling required to get it installed. It simply uses the stake pockets to keep it secure on your truck bed rails.Just down inside our stake pocket here, there's an expanding rubber post. What's really nice about this system is you pre-assemble it on your rail before you slide it in, so you can see the rubber post, you drop it down, and you can access the tightener here on top.Once you tighten it down, it's nice and secure.

And you don't have to worry about fumbling with any hardware, holding it inside the stake pocket hole, and potentially losing it inside.Should you ever need to remove your ladder rack completely, the bolts at the end can be removed and it'll simply slide off.What else is great about this ladder rack is since it mounts in your stake pockets, it'll work with roll-up Tonneau covers. Now if you have a folding Tonneau cover, there may be some collision when trying to open it with your ladder rack.

Customer Reviews

Thule TracRac SR Sliding Truck Bed Ladder Rack w/ Cantilever - 1,250 lbs - TH43003XT-510EX

Average Customer Rating:  4.8 out of 5 stars   (21 Customer Reviews)

This versatile, sliding ladder rack adjusts along the length of your truck bed and easily removes from the included T-track base rails. Over-the-cab extension lets you carry long pipes, lumber, and more. Lightweight, rustproof aluminum construction.

- TH43002XT-783EX

Review from a similar Thule SR in Ladder Racks

Shipping was quick As described Easy to assemble. Wish the kit had one set of directions so I wouldn't have had to take the front rack apart after the fact. The final bolts for the canteleaver seem to be a damage/ scratch hazard. Looks pretty slick though. 704535

- TH43003XT-501

Review from a similar Thule SR in Ladder Racks

Great product! Packaging could be better for the larger pieces (rub marks). My 2018 Ram 1500 quad cab came with some small challenges that I had to solve myself. No videos or written words available. Basically if your bed rails are covered with a bed liner you need to remove the plastic sleeve in the rear stake pockets. Otherwise you won’t get an equal spacing from one rail to the other. You will also need to use the provided rubber tape with the wedges in order to make the rails level. Otherwise it went together great. 706744

- TH43003XT-785

Review from a similar Thule SR in Ladder Racks

Assembles easy, installs easy and seems to be quality materials. 585405

- TH43002XT-610

Review from a similar Thule SR in Ladder Racks

Fantastic products and the rails slide very easily I’m excited to get to know her better and to use it for many years to come 637411

- TH43003XT-000

Review from a similar Thule SR in Ladder Racks

Couldn't be happier with the Rack, it went together and operates flawlessly. Dealing with e trailer was a snap, I was informed all the way through the buying process of shipping and arrival dates. Will absolutely buy shop again with e trailer. 213054

Im as happy today as I was the first day that I had the Rack. Its agreat product!!
Chris - 08/05/2016


- TH43002XT-000

Review from a similar Thule SR in Ladder Racks

I have been planning to buy these for years. Now that I finally bit the bullet, I'm quite happy with the product. Installation was simple and straight forward and the flexibility of the rack is great. At first I had hoped to reuse an old rack that I bought on CL with new base rails and cantilever extension from etrailer. While the old racks still worked with the base rails, the cantilever extension package didn't interface properly. I ended up opting to buy all new parts for the sake of simplicity. I'll put the used rack back on CL. I did have some problems with the order initially due to incorrect parts being in the package, but customer service at etrailer was top notch and everyone I spoke with was helpful. We ironed out the problems and etrailer sent out new parts immediately. What could have been a frustrating experience was turned into a slightly prolonged but easy process of getting a great rack on my truck. Thanks! 270839

- TH43003XT-000

Review from a similar Thule SR in Ladder Racks

Bought new Trac Rac SR racks. Great price, fast delivery. One small piece to the system was missing which prevented me from installing the racks. Contacted George and he had the missing part shipped out right away. Seems the missing piece was the factory's fault not etrailers. Will use again in the future. 462111

- TH43002XT-783

Review from a similar Thule SR in Ladder Racks

The only sliding rack that works on my GMC Canyon, and as good (if not better) than the original TrackRac I purchased over ten years ago (and still in use) for my Tundra. Wish the TrackRac sliding rack/tonneau combination were still available; it was the PERFECT combo! 660641

- TH43001XT

Review from a similar Thule SR in Ladder Racks

This is essentially the same rack TracRac has been making for years – great materials and very well engineered. It is not spec'ed for a Gen2 Toyota Tacoma, because the composite bed doesn't have stake pockets – but after I popped off the plastic bed side caps, there were lots of options for attachment. You just have to be comfortable drilling holes in the rack and in the sheet metal of your truck. In the end, it looks and functions great. 591638

- TH43003XT-000EX

Review from a similar Thule SR in Ladder Racks

The rack system is very well put together. I only had a couple of issues with the instalation. There wasn't any directions with the base rails, so it took a bit to figure out how it went together and what holes to use for my truck. The canteilever kit, The top bolt that holds the cross bar should be a button screw and square nut, not a square head bolt and nut. with the square head bolt and nut it could interfere with a long load since it sticks up and could catch on anything being loaded . All and all a nice rack. I got this type of rack hoping that I could slide the rear post forward as to not interfere with my 5th wheel when towing it. That part is yet to be dedurmined. 526720

- TH43002XT-781

Review from a similar Thule SR in Ladder Racks

Very happy with the rack on my 2018 Silverado. I also have the Back flip hard top bed cover. I am able to open all but the very last position. I might still be able to adjust the rails and to get there but it hasn't been an issue. Used it to haul lumber and I made a bicycle rack that works with the racks and the bed cover down. Works great. Was not hard to install. 705960

- TH43002XT-606

Review from a similar Thule SR in Ladder Racks

Well built product. Easy install. Combined it with a Bakflip F1 Tonneau cover. Minus a few minor things they work well together. 521238

- TH43002XT-000

Review from a similar Thule SR in Ladder Racks

This is a high quality product. The parts are all well made, and most everything is either stainless or aluminum, so it should last a long time. I bought it because my Kargo Master Pro-II was rusting up badly in only about eight years. Assembly isn't easy. Takes lots of time to get the rails level and evenly spaced, needs to be near perfect for the uprights to slide easily. And, there are just a lot of parts to put together. Assembly took a little longer because the instructions didn't match the kit in one area. The manual tells you to pre-assemble a bunch of fasteners, but then you realize that your parts don't have slots, like the instructions expect, but rather holes instead. So, the parts needed to be unassembled, then reassembled again, this time through the holes. No biggie, but it added to the time necessary. Be nice if the clips up on top could be easily removed when not in use. They look strange, and add height to your truck. I only ordered two of the tie-downs with the rack, should have ordered four so that shipping would be free. They are expensive, but nice. They didn't suggest it in the manual, but I think it would be a good idea to use anti-sieze on the hardware, I'm a little worried about galling down the road when disassembly is necessary. Stainless is prone to do that. In summary, though, this is a dang nice rack! I don't regret the purchase at all. 302432

Im still happy with the TracRac. Its very handy, and no rust! Unlike the one I replaced it with.
Brian L - 10/17/2017


- TH43003XT-784EX

Review from a similar Thule SR in Ladder Racks

Product is great and installed easily once I figured out that for my Ram 1500 Laramie, the pocket stakes are too big for the rubber blocks and won't work and I did have to drill thru the plastic molding. Once I figured out the stake holes wouldn't work I looked at the drawing again and the holes where Tundra is listed gave me the idea to try those. Those holes worked on the Ram and I ended up drilling out the "spikes" that hold the molding onto the sheet metal. No drilling thru the sheet metal was required, only the plastic. Maybe I missed an install video for the Ram, it would have made the install much quicker and I wouldn't have to buy covers for my now cut out front stake pocket holes which weren't covered by the rails as I hoped they would. I haven't installed the cantilever as I don't need it yet. 666596

- TH43003XT-000

Review from a similar Thule SR in Ladder Racks

Have not installed so can't speak for the rack but the service and response at etrailer regarding other orders and question we had was excellent. The Bed Mat fit perfectly as advertised. Waiting for seat covers. etrailer made sure the order was correct. 544389

- TH43002XT-000EX

Review from a similar Thule SR in Ladder Racks

Rack was easy to install, I use it daily and it's definitely built for it. I got a new truck and had to switch the bed rails out, ordered just the rails and changed it over in an hour. Great rack! 409298

- TH43003XT-010

Review from a similar Thule SR in Ladder Racks

I have owned many of these ladder racks and they are great. My only recommendation is to use anti seize lubricant on any of the bolts that need to be loosened and tightened to adjust racks and for rack removal as the bolts are stainless steel and the rack materials are aluminum. Enjoy! 716817

- TH43002XT-501

Review from a similar Thule SR in Ladder Racks

Perfect, I'm very happy with the produc t. 654485

- TH43002XT-781EX

Review from a similar Thule SR in Ladder Racks

this is an excellent product with fast shipping customer service good that I just bought was for the trucks of a company but I definitely think that I would install one to my personal truck amazin thanks 526787

- TH43002XT-000

Review from a similar Thule SR in Ladder Racks

Product came fast and it was as expected. Assembly was not too difficult and I was able to have it on the truck in an afternoon. 500595

- TH43002XT-000EX

Review from a similar Thule SR in Ladder Racks

Great 213519


Ask the Experts about this Thule Ladder Racks

  • Which TracRac SR Ladder Rack Fits a 2008 Ford F-250 Super Duty 6-3/4 Bed
    The correct TracRac SR ladder rack for your 2008 Ford F-250 Super Duty 6-3/4' bed is part # TH43003XT-510. If you want the over-the-cab extension then you need part # TH43003XT-510EX instead. Either option will sit 28-15/16" high (including the base rails) and will work great with the Toolbox Mounting Kit # TH25200 that you already have. I have attached some review videos for you to check out.
    view full answer...
  • Tonneau Cover and Ladder Rack Combinations for a 2012 Ford F-250 and F-350 Super Duty 6-3/4 ft Bed
    We do have options for a tonneau cover and a ladder rack that are confirmed fits for your 2012 F-250 and F-350 Super Duty with a 6-3/4 Foot Bed. If you are looking for a soft tonneau cover then you will want to use the TruXedo Lo Pro QT Soft Tonneau Cover for Invis-A-Rack Folding Ladder Rack # TX569197 which was created to work with the DeeZee Invis-A-Rack Folding Ladder Rack # DZ951600. The Invis-A-Rack will fold down so that your truck has a nice sleek look when you are not using the...
    view full answer...
  • Can the Toolbox Mounting Kit TH25200 be Used on TracRac Sliding Ladder Racks with Over-Cab Extension
    Toolbox Mounting Kit # TH25200 can be used with any of the TracRac sliding ladder racks including # TH43003XT-510EX. For either style of the TracRac sliding ladder rack the front uprights mount to the outer tracks on the base rail. The inner track will be used for the toolbox mount.
    view full answer...
  • Headache or Ladder Rack with Over Cab Storage for a 2006 Ford Super Duty
    We do have some options that are similar to what you are looking for your 2006 Ford Super Duty but, they are ladder racks and not headache racks. If you have an 8 foot bed I recommend the TracRac sliding ladder rack with over the cab extension # TH43003XT-010EX. There is also a similar, non-sliding version, # TH37003XT-EX. And there are a couple of more economical options in # TH91000 and # EM07707. For a short bed the sliding ladder rack with extension is # TH43003XT-510EX. The other...
    view full answer...
  • TracRac SR Ladder Rack Compatible with Access TonnoSport Soft Roll-Up Tonneau Cover
    The Access TonnoSport Soft Roll-Up Tonneau Cover # A22010319 that you referenced is a confirmed fit on your 2004 Ford F-250 with the 6-3/4-foot bed. Thank you for your photo showing it installed. Since this cover installs inside the truck's bed rails, rather than on top of them as some other covers do, this means that those rail tops can be available for installation of a ladder rack. When both a tonneau cover and a ladder rack mount in the same place they will be incompatible, but when...
    view full answer...
  • Ladder Rack with Over Cab Extension Recommendation for 2016 Ford F-250
    Do you have a TracRac ladder rack installed currently with the overhead extension? Did you use the recommended parts for your truck or did you modify something else? I checked with Thule TracRac and they recommend the part number # TH43003XT-510EX for if you have a short bed or part # TH43003XT-010EX for if you have a long bed.
    view full answer...

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Info for this part was:

Edited by:
Tyler C
Expert Research:
Jameson C
Video by:
Dustin K
Video Edited:
Chris R
Written by:
Matthew S
Test Fit:
David F

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