Universal Crossbar Kit

TrailRax set the standard for modular roof rack systems — and now we’re bringing that same innovation to a universal mounting system. The TrailRax Universal Crossbar System is engineered to provide a true modular solution for vehicles with integrated T-tracks. They can mount on truck campers, truck caps, truck beds, vans with t-tracks installed, or any other vehicle that have t-slot channels for mounting. Designed to fit a wide variety of brands and configurations, this rack expands your vehicle’s storage capability without locking you into a vehicle-specific platform. Available in 47.5", 48.5", 50", 53.5", and 55.5" widths, this system allows you to dial in the perfect fit for your specific topper setup. Constructed from high-strength 5052 aluminum, this rack is lightweight, corrosion-resistant, and built for long-term durability in harsh environments. Our precision aluminum extrusions (TSLOTS) deliver mounting flexibility, allowing you to easily attach rooftop tents, recovery boards, fuel cans, tool mounts, cargo boxes, and more. Crossmembers feature integrated cutouts for simplified hardware installation and accessory mounting without unnecessary disassembly. Installation is straightforward: the crossbars mount directly into your track system, distributing weight evenly and maintaining structural integrity without drilling or permanent modification. Your truck topper or vehicle must have a roof track with M6 or M8 track nuts for this product to work. Whether you’re building a dedicated overland rig, upgrading your work truck’s cargo capacity, or creating a modular adventure platform, the TrailRax Universal Topper Rack delivers unmatched flexibility, strength, and expandability. Added height: 3.50"-4.25" Disclaimer: While the TrailRax Universal Crossbar System is engineered to support substantial loads when properly installed, the structural capacity of the vehicle’s roof, topper or cap — particularly fiberglass models — may limit the overall load rating of the installed system. The end user is solely responsible for verifying the load-bearing capacity and structural integrity of their specific topper or cap prior to installation and use. Always refer to the topper manufacturer’s published weight ratings and guidelines. Due to the universal design of this product and the wide variation in topper and cap configurations, mounting hardware required to secure the rack to a specific topper may not be included. The customer is solely responsible for determining appropriate hardware specifications and sourcing any additional components necessary to ensure safe and proper installation. TrailRax assumes no responsibility or liability for improper installation, use beyond the manufacturer’s specifications, structural failure of the topper or cap, or damages resulting from exceeding the topper manufacturer’s stated load limits.