Crossover truck boxes are the most popular truck storage option. They mount across the full width of the bed just behind the cab, giving you maximum storage volume and easy access from either side of the truck. We carry crossover truck boxes from trusted brands in aluminum and steel, in sizes designed to fit most full-size and mid-size trucks.
Full-Width Access From Either Side
The defining feature of a crossover box is the dual-access lid — hinged at the center and opening from either side so you can reach your tools from the driver's side or the passenger side without walking around. On a busy jobsite where you might be loading from one side and unloading from the other, that saves real time over the course of a day. Most lids are supported by a gas spring or lid stay arm so they hold open on their own, leaving both hands free while you dig for tools.
Crossover boxes sit directly behind the cab, using the space above the bed rails where most loads don't reach. The remaining bed space behind the box stays fully usable for long materials, equipment, and larger loads. Most models mount to the top of the bed rail with adjustable clamps or J-bolt brackets — no drilling required on standard installations.
Aluminum and Steel Built for the Long Haul
The crossover boxes in this collection are available in heavy-duty aluminum and steel from Better Built and WeatherGuard — two brands that have built their reputations on truck storage that holds up in the real world. Aluminum is lighter and naturally rust-resistant, making it a strong choice for regions with road salt, humidity, or coastal conditions. Steel offers more impact resistance for boxes that take harder daily abuse.
Both brands use compression latch and weather seal systems that keep rain, dust, and road spray out of the interior. Locking mechanisms secure the lid when closed.
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Frequently Asked Questions
A crossover box mounts across the full width of the truck bed behind the cab. It typically has a single lid that opens from either side, giving you access from the driver or passenger side without walking around.
Most crossover boxes mount to the top of the bed rail using adjustable clamps or J-bolts. No drilling is required on most standard installations.
No. A crossover box sits at the cab end of the bed, leaving the remaining bed length open for cargo. It reduces overall bed length but does not block the full bed.
Measure your truck bed opening from rail to rail before ordering. Full-size and mid-size trucks take different widths. Check the fitment guides on individual product pages for your specific truck.