The best truck bed cross bars with a tonneau cover are the ones designed for your truck size and the specific cover mounting system. The adjustable aluminum pair for full-size trucks suits common full-size pickups; the mid-size pair fits trucks such as the Tacoma and Ranger; and the T-slot models are intended for compatible retractable covers. A universal steel option offers a different setup, but it includes one rack rather than a pair. Check cover clearance and fitment before choosing.
| Product | Best for | Key distinction |
|---|---|---|
| Full-size aluminum cross bars | Full-size trucks with several cover styles | Adjustable width; cover folding may be restricted |
| Mid-size aluminum cross bars | Mid-size truck owners | Fitment list includes Tacoma, Ranger, and Colorado |
| Full-size T-slot bars | Full-size trucks with T-slot retractable covers | Uses T-slot nuts and bolts |
| WLS universal steel rack | Buyers seeking broad width adjustment | One rack included; 53–73-inch width range |
| Mid-size T-slot bars | Mid-size trucks with T-slot retractable covers | Not for retractable covers without T-slots |
Adjustable Full-Size Aluminum Cross Bars
This two-piece aluminum cross-bar set is best for owners of listed full-size pickups, including the Ram 1500, Ford F-150, Chevrolet Silverado 1500, GMC Sierra, Nissan Titan, and Toyota Tundra. Its adjustable-width slide-groove design and stated compatibility with roll-up, retractable, and folding tonneau covers make it a flexible choice for carrying items such as kayaks, ladders, and cargo boxes.
Important fitment check: The product name states a 71-inch length, while its feature text says 65 inches. Confirm the actual dimensions and truck fit before ordering. It is not compatible with sunken retractable covers. The listing also warns that folding covers may not fold back after installation, even though the retractable cover can still open and close.
Adjustable Mid-Size Aluminum Cross Bars
Choose this two-piece aluminum set if you drive a listed mid-size truck such as a Jeep Gladiator, Toyota Tacoma, Ford Ranger, GMC Canyon, Chevrolet Colorado, Nissan Frontier, or Ford Maverick. The bars have adjustable width and are described as compatible with trucks with or without roll-up, retractable, soft tri-fold, or hard tri-fold covers. Listed uses include bikes, snowboards, tents, kayaks, and ladders.
This is the better choice than the full-size version when your truck is in the listed mid-size group. Avoid it if your retractable cover sits below the bed rails: the listing excludes sunken retractable covers. Folding cover panels may also be unable to fold back while the bars are installed.
Full-Size T-Slot Retractable-Cover Bars
These two aluminum cross bars are best for full-size truck owners whose retractable tonneau cover has T-slots. The listing names common full-size models and includes two types of T-slot nuts and bolts. The slide-groove design provides width adjustment, and the bars are intended to leave the retractable cover able to open and close.
Choose this model over the general full-size version when your cover has the required mounting tracks. It is not suitable for retractable covers without T-slots. Check the T-slot dimensions against the supplied hardware before purchase. Although the product title states 71 inches, its feature text describes a 65-inch length, so verify the dimensions with the seller.
WLS Universal Adjustable Steel Rack
The WLS rack is best for buyers who want a wide adjustment range and a steel construction option. Its stated width adjusts from 53 to 73 inches, and the listing describes compatibility with soft and hard folding tonneau covers. It is made from Q235A carbon structural steel with electrophoresis and a black powder coating. The listed load capacity is 600 pounds.
A key limitation is that the package includes only one bed rack and mounting hardware. The seller recommends using two or three units to enhance loading function, so this is not a like-for-like two-bar set. Confirm how many units your intended cargo setup requires and verify the fit for your particular truck and cover.
Mid-Size T-Slot Retractable-Cover Bars
This two-piece aluminum set is best for listed mid-size pickups—including Tacoma, Ranger, Gladiator, Canyon, Colorado, Frontier, and Maverick models—with retractable tonneau covers that have T-slots. Its adjustable slide-groove design and included T-slot hardware provide a track-based mounting option for carrying gear above the bed.
Choose this over the general mid-size bars if your retractable cover has T-slots and you want the cover to remain operable. The listing specifically excludes retractable covers without T-slots. Check that the hardware dimensions match your cover’s tracks before ordering; truck model fitment alone does not confirm T-slot compatibility.
Buying Guide: How to Choose Cross Bars for a Tonneau Cover
Does the bar set fit your truck size?
Start with the product’s stated truck category and model list. Full-size and mid-size versions are not interchangeable by assumption. Compare your truck’s make, model, and bed configuration with the seller’s fitment information, and confirm the bar dimensions—especially when the listing gives conflicting measurements.
What type of tonneau cover do you have?
Identify whether the cover is roll-up, folding, or retractable. Then check how the bars mount. General clamp-on or cover-compatible designs may list several cover types, while T-slot bars require matching tracks. A retractable cover that sits below the bed rails may not work with products that exclude sunken covers.
Will the cover still open or fold?
Do not treat “compatible” as a guarantee that every cover function remains available. The general aluminum-bar listings say retractable covers can open and close, but warn that folding covers may not fold back with bars installed. Confirm the effect on your exact cover before buying.
How many bars or racks are included?
Compare package quantity, not just the product name. Several options here include two cross bars, while the WLS listing includes one rack and recommends using two or three for enhanced loading function. Also review the stated load capacity and follow the product’s instructions for cargo placement and securement.
Frequently Asked Questions
Can I use cross bars with a tonneau cover?
Yes, if the bars are designed for your truck and cover mounting system. Check cover type, truck fitment, and clearance before purchase.
Can cross bars work with a retractable tonneau cover?
Some can. The listed T-slot models require a retractable cover with compatible T-slots; the general models exclude sunken retractable covers.
Will cross bars stop a folding cover from opening?
They may limit folding. The general aluminum-bar listings warn that folding covers may not fold back after installation.
Are these cross bars sold as a pair?
Four listings describe two-piece sets. The WLS product includes one rack, and its listing recommends two or three units for enhanced loading function.
What should I verify before ordering?
Confirm truck fitment, cover style, T-slot dimensions if applicable, product length, included quantity, and whether the cover can still operate as intended.