In the towing roof racks cargo space, the decision usually comes down to one of three jobs: you need a complete basket for the roof, you need to stretch an existing basket with more floor area, or you need to replace the fairing mounting hardware on a carrier you already own. Those jobs point to very different products, and this comparison looks at four options that cover all three.
Quick take
The four products here break into three roles. The CURT 18124 Roof Rack Cargo Carrier Extension is the add-on for an existing basket. The Heavy Duty Steel Roof Rack Cargo Carrier 250LB Capacity with Net & Straps is the full roof basket. Two CURT fairing hardware kits handle maintenance: the CURT Replacement Fairing Hardware for Roof Rack Cargo Carrier 19304 and the CURT 19242 Replacement Fairing Hardware for Roof Rack Cargo Carrier 18115 19242. If you already have a basket and just need more flat area, the extension is the direct match. If you are starting from a bare rack, the full steel carrier gives you a complete system. If a current carrier is missing its fairing hardware, one of the two replacement kits is the most targeted fix.
Listed price comparison
| Product | Listed price | Price bar |
|---|---|---|
| CURT Replacement Fairing Hardware for Roof Rack Cargo Carrier 19304 | USD 36.99 | |
| CURT 19242 Replacement Fairing Hardware for Roof Rack Cargo Carrier 18115 19242 | USD 36.99 | |
| CURT 18124 Roof Rack Cargo Carrier Extension 6 Square Feet Black Steel 18124 | USD 105.99 | |
| Heavy Duty Steel Roof Rack Cargo Carrier 250LB Capacity with Net & Straps | USD 268.35 |
The listed price spread runs from the two hardware kits at USD 36.99 to the full steel basket at USD 268.35. The extension sits between them at USD 105.99.
Decision matrix
| Product | Good for | Keep in mind |
|---|---|---|
| CURT Replacement Fairing Hardware 19304 | Replacing missing fairing hardware and clips | Fairing itself is not part of the kit |
| CURT 19242 Replacement Fairing Hardware 18115 | Repairing fairing hardware on the carrier model named in the title | The 18115 model match is the main identifier |
| CURT 18124 Roof Rack Cargo Carrier Extension | Expanding an existing roof basket | Designed as an extension, not a full carrier |
| Heavy Duty Steel Roof Rack Cargo Carrier | A complete steel basket with net and straps | The one-piece carrier in this lineup |
Product notes
CURT 18124 Roof Rack Cargo Carrier Extension 6 Square Feet Black Steel 18124
This is the mid-priced item in the lineup, and it is the only one described as an extension rather than a whole carrier. The listing says it adds 6 sq. ft. to your current roof basket setup, which can make a real difference when bulky or awkward gear needs room. The black steel construction is listed in the title, and the description calls out a design meant to keep cargo from shifting on inclines or rough terrain. The main limitation is scope: because it is specifically an extension, plan to install it on an existing basket system instead of treating it as a standalone roof carrier. If you already own a CURT-style basket and just need more surface area, this is the most direct fit.
Heavy Duty Steel Roof Rack Cargo Carrier 250LB Capacity with Net & Straps
This is the only complete roof basket in the set, and its product name leads with a 250 lb capacity plus a net and straps. The description adds a steel wind fairing to cut resistance and noise, universal U-bolts for mounting to most vehicles, and a rust-resistant powder-coated finish. The listed dimensions are 64.00in long by 39.00in wide, with an item weight of 35.00lb, so it is built for serious cargo duty. If you want one piece that becomes the entire roof-top cargo system, this is the pick. The clear trade-off is the listing price: it is the most expensive option here, so it makes sense when a full-capacity cargo basket is more important than a smaller add-on or replacement part.
CURT Replacement Fairing Hardware for Roof Rack Cargo Carrier 19304
This kit targets owners who still have a roof basket but are missing the hardware that holds the fairing in place. The description says the package includes the necessary hardware and clips, while the fairing itself is not included. The part type is listed as Fairing Hardware and the cargo management type as Roof Basket, which helps you match it to a basket-style carrier. It is a lower-cost path to keeping an existing carrier in working order. The limitation is that it is a repair part rather than a cargo-carrying upgrade: it will not add capacity or replace a damaged fairing.
CURT 19242 Replacement Fairing Hardware for Roof Rack Cargo Carrier 18115 19242
If you already own the CURT roof rack cargo carrier 18115, this replacement kit has the product name that points directly to that carrier. The description frames it as a way to replace damaged or missing fairing hardware and reduce drag, with only the hardware and clips included. That makes it a maintenance purchase rather than a new-cargo purchase, so it belongs on a shopping list for keeping an existing setup safe instead of adding carrying capacity. The 18115 reference in the title gives you a concrete model match to use against your own basket. Like the other hardware kit, the fairing itself is not part of the package.
Final recommendation
If you are starting with an empty rack and need a complete steel carrier, the Heavy Duty Steel Roof Rack Cargo Carrier 250LB Capacity with Net & Straps at USD 268.35 is the full-system option. If you already have a basket and need 6 additional square feet, the CURT 18124 Roof Rack Cargo Carrier Extension at USD 105.99 is the expansion piece. If you are maintaining a CURT basket and only need to replace the fairing mounting hardware, both CURT Replacement Fairing Hardware for Roof Rack Cargo Carrier 19304 and CURT 19242 Replacement Fairing Hardware for Roof Rack Cargo Carrier 18115 19242 are listed at USD 36.99; pick the one whose product name matches your carrier.
