Compatibility note: These cross bars are built to mount into the integrated T-slot channels of a Westin retractable tonneau cover, which is sold separately. A compatible Westin retractable tonneau cover is required. Cargo accessories (rooftop tents, cargo boxes, kayak/bike carriers, baskets) are also sold separately.
Already running a Westin retractable tonneau cover? The Westin Cross Bars let you carry gear on top of it without giving up the clean, low-profile look or the secured bed underneath. Sold as a pair of 73-inch bars, they drop into the cover's integrated T-slot channels to create a stable, full-width platform for hauling rooftop tents, cargo boxes, kayaks, bikes, lumber, and bulky gear — turning your covered bed into a true dual-purpose setup with protected storage below and load-carrying capability above.
They're a smart upgrade for overlanders and weekend adventurers building out a rig, as well as work-truck owners who need to move long or oversized items while keeping tools and cargo locked and dry beneath the cover. The appeal is straightforward: more usable cargo capacity up top, a rugged-yet-sleek aluminum build, and a quick, no-fuss install that works with the T-slot system already on your cover. For anyone who wants their tonneau to do double duty, it's one of the most practical add-ons available.
Key Features
- Full-width 73" platform — A pair of long cross bars spans the bed to create a stable base for tents, boxes, kayaks, and oversized cargo
- High-strength anodized aluminum rails — Lightweight construction keeps weight down while standing up to heavy loads and harsh weather, with a corrosion-resistant finish
- Powder-coated steel mounting feet — Four rugged feet anchor securely into the cover's T-slot channels for a stable platform that won't shift under load
- T-slot mounting, no drilling — Comes complete with all mounting hardware and instructions; the feet slide into the existing channels for a clean, hassle-free install with no holes to drill
Built to Carry, Designed to Last
These cross bars are engineered to integrate with the T-slot channels found on Westin's retractable tonneau covers, so they install into the existing track rather than requiring you to modify your truck or cover. Each bar measures roughly 73" long x 2" wide x 1.25" tall — a low, aerodynamic profile that helps minimize wind noise and vibration on the highway while still giving you a strong, full-width mounting surface for gear.
Material quality is the standout. The cross rails are made from lightweight, high-strength anodized aluminum, chosen for its strength-to-weight ratio and its resistance to rust — anodizing grows a hard protective layer into the metal itself, so even a scratch won't lead to corrosion. The four mounting feet are made from powder-coated steel for rigid, durable anchoring into the cover's channels. Together they deliver a platform that holds up to rain, road spray, sun, and trail grime season after season. *(Finish varies by version — Westin's cross bars are offered in both a brushed/anodized silver and a black powder-coat look. Confirm the finish that matches the SKU you're selling.)*
Because they use a standard T-slot interface, the bars accept a wide range of accessories that clamp around the bar or mount into the channel, so they pair with most rooftop tents, cargo boxes, kayak and bike carriers, and gear baskets. Designed and engineered in San Dimas, California, they reflect Westin's long-standing "make it right, make it last" approach to truck accessories.
Weight Capacity
The cross bars are rated as follows:
- Up to 150 lbs per bar — the rated capacity of each individual cross bar.
- 300 lbs dynamic (total) — maximum combined load while the vehicle is in motion.
- 700 lbs static (total) — maximum combined load while parked/stationary (for example, an occupied rooftop tent at camp).
Important: Your tonneau cover also has its own load rating (for example, Westin's Power Retractable Tonneau Cover supports up to 500 lbs evenly distributed). Always stay within the lower of the cross-bar rating and your cover's rating, distribute loads evenly across both bars, and secure all cargo properly.
Installation
This is a DIY-friendly upgrade for most tonneau owners.
- What's needed: Basic hand tools; the bars install using the included hardware kit.
- Drilling/modifications: None — the mounting feet slide into the cover's existing T-slot channels.
- Fitment notes: Requires a compatible Westin retractable tonneau cover with integrated T-slot channels. The 73" length is sized for full-width bed spanning.
- Time estimate: A short, single-session job; exact timing varies.
- Included for easy setup: Four mounting feet, the install kit, and step-by-step instructions all come in the box.
Always follow the included instructions for proper positioning and torque.
What's Included
- (2) 73" anodized aluminum cross rails
- (4) Powder-coated steel mounting feet
- (1) Installation hardware kit
*Sold as a pair (set of 2 bars). The tonneau cover and any cargo accessories (tents, boxes, carriers) are sold separately.*
Care & Maintenance
A little routine care keeps these bars looking sharp and performing safely:
- Routine cleaning: Wash with mild soap and water and a soft cloth to remove dirt, salt, and road grime; rinse and dry. Clean more often after winter or off-road use.
- Avoid abrasives: Skip abrasive pads and harsh solvents that can scratch the anodized or powder-coat finish and open it to corrosion.
- Protect the finish: An occasional coat of non-abrasive automotive wax helps preserve the finish and its corrosion resistance.
- Periodic inspection: Before trips and after heavy loads, confirm the mounting feet are seated and torqued in the T-slot channels and that all accessory hardware is secure; re-tighten as needed.
Warranty
These cross bars are backed by Westin's manufacturer warranty against defects in materials, workmanship, and finish under normal use. *(Westin's comparable cross bars carry a 3-Year Warranty; confirm the exact term for this specific part number before publishing.)*
- Covered: Manufacturing defects in materials, workmanship, and finish.
- Not covered: Damage from road hazards (gravel, debris), product misuse, improper installation, overloading, accidents, modifications, neglect, or abuse; and costs such as removal, installation, labor, freight, or consequential damages.
- Registration: No separate registration required. Keep your purchase receipt — the original purchaser must provide proof of purchase and return defective merchandise to the original place of purchase to make a claim.
*This is a summary; refer to Westin's full Warranty Policy for complete terms.*
Terms to Know
- T-slot channel: A slotted track (shaped like a "T" in cross-section) integrated into the tonneau cover rails. Mounting feet and accessory hardware slide into the slot and lock down, so you can add or reposition bars and gear without drilling.
- Anodized aluminum: Aluminum treated through an electrochemical process that grows a hard, corrosion-resistant surface layer into the metal. It's tougher and more weatherproof than bare or painted aluminum, and won't rust if scratched.
- Powder coat: A dry finishing process where pigment is applied as a powder and cured under heat into a tough, chip-resistant coating — used here on the steel mounting feet for durability.
- Dynamic load: The maximum weight the bars can safely carry while the vehicle is moving (here, 300 lbs total). Always lower than the static limit because of road forces and bumps.
- Static load: The maximum weight the bars can support while parked and stationary (here, 700 lbs total) — relevant for things like an occupied rooftop tent.
- Cross bars / cross rails: The horizontal bars that span the bed and create the platform your cargo and accessories attach to.
Specs
- Rail length - 73"
- Dimensions (each) - 73" L x 2" W x 1.25" H
- Quantity - Sold as a pair (set of 2)
- Rail material - Anodized aluminum
- Foot material - Powder-coated steel
- Finish/color - Brushed/anodized or black — confirm per SKU
- Load (per bar) - 150 lbs
- Load (dynamic / static, total) - 300 lbs / 700 lbs
- Required - Compatible Westin retractable tonneau cover (sold separately)