What Is a Cargo Carrier? | Gear Hauling Basics

In the U.S., the term usually refers to an external storage box or platform on the back of a car, not a freight company. These accessories solve a simple problem: your vehicle is full, and the gear does not fit. For road trips with bikes, coolers, or camping equipment, a cargo carrier shifts that load to the rear hitch or the roof, keeping the cabin open for people. The most common styles are hitch-mounted trays and baskets, plus roof-mounted boxes, each suiting different trips. The right choice depends on your vehicle’s hitch class, roof rack, and how much weight you need to move.

The Main Types Of Cargo Carriers

Hitch carriers lead the market because they are easy to load and keep gear off the roof. They slide into the rear receiver hitch and lock in place with a pin. Buyers choose between a flat tray or an open basket with raised sides. The CURT 18110 is a typical tray model, offering a 300 lb capacity on a 48″ x 20″ black steel platform. Lighter aluminum versions exist, like the Erickson models, which cap at 300-400 lb for evenly distributed loads. Roof boxes and baskets work when the hitch is already holding a trailer or when the item is long and awkward, like a kayak. They need a compatible roof rack system and raise the vehicle’s center of gravity, affecting handling. Thule markets both styles as versatile storage.

Matching A Carrier To Your Vehicle

The most important compatibility check is the hitch receiver size. Most modern trucks and SUVs use a 2-inch receiver, while smaller crossovers often use a 1-1/4-inch tube. The Erickson Aluminum Cargo Carrier and CURT 18110 both accept 1.25-inch and 2-inch receivers, often with an adapter sleeve included. The MaxxHaul 70107 fits only a 2 x 2-inch receiver, so you need a reducer for the smaller tube. Capacity matters just as much: the Harbor Freight HAUL-MASTER and Northern Tool Ironton carriers both list a 500 lb working load, well above the 300 lb rated on basic steel models. That distributed load rating means you spread weight evenly across the platform, not pile it into one corner. Loading far past the rating stresses the hitch, shank, and welds.

Weight Limits And Practical Setup

Carriers typically weigh 25-35 lb empty, and the hitch’s tongue rating handles the combined weight of carrier plus cargo. Checking the vehicle’s owner’s manual for the Class III receiver rating is required before loading; exceeding it is the most common misuse and can bend the receiver or detach the carrier entirely. Assembly is generally straightforward. The Erickson models use welded aluminum with an anti-wobble stabilizing hitch pin to reduce rattling. Most steel units need a few bolts, and some need a wrench. The carrier slides into the receiver, the pin goes through aligned holes, and the clip locks it—the same process for the 300-lb CURT tray or the 400-lb Erickson with its loading ramp.

Cargo Carrier Safety And Security

A rear carrier adds roughly 20-50 inches of length beyond the bumper, reducing the departure angle and causing the hitch to scrape on steep driveways. The CURT 18110 uses a bent shank design to raise the platform and improve clearance. Rear visibility suffers, so check the blind spot before reversing. Weather exposure matters too, which is why manufacturers use powder-coated steel or aluminum; the Buyers carrier adds a water-resistant double-walled lid for rain protection. Security varies: the Buyers carrier includes two pad-lockable hasps, while many open trays have no locking protection. For a detailed rundown of tested models, our best van cargo carrier picks walk through capacity and build quality side by side.

Before buying, measure the cargo area. The Erickson Deluxe has inner dimensions around 50″ x 30″, fitting two large coolers. Compact models like the MaxxHaul measure closer to 51″ x 17-1/2″ inside, suiting a single duffel or generator. Those external dimensions can interfere with parking sensors or block the license plate, so a quick measurement of the rear overhang settles it.