CURT 21" x 37" Black Steel Roof Rack Cargo Carrier Extension #18117

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This roof rack cargo carrier extension piece is designed to increase the storage area of the CURT roof rack cargo carrier #18115.

Quick Facts:

  • Expands the storage area of the CURT roof-mounted cargo basket #18115
  • Frees up space inside the vehicle for passengers and cargo
  • Adds almost six sq. ft. of storage area
  • Mounts to most roof rack base rails
  • Lightweight and easy to install
  • Protected by a highly durable carbide powder coat finish
  • Limited lifetime warranty (one-year finish, one-year parts)
  • For use with CURT #18115 only
  • Inside dimensions: 21" x 37" x 4"
  • Adds almost six sq. ft. of storage area
  • CURT part number: 18117

Even with the roomiest of vehicles, packing the car for a long trip can quickly turn into a frustrating game of Tetris. CURT cargo carriers are a simple yet effective solution for maximizing the storage area of your vehicle. The CURT roof rack cargo carrier is a roomy and versatile cargo carrier with a lightweight design and easy installation. It features a simple two-piece assembly and mounts to most styles of roof rack base rails. With its strong steel construction and durable black powder coat finish, it easily stands up to the tough trails and long miles ahead. One of the key advantages to the CURT roof rack carrier is its extension option. With this extension piece installed, the cargo rack goes from a little over ten square feet of storage room to an impressive 16 square feet, providing a lot of extra room for storing bulkier items. The roof rack cargo carrier readily accepts a CURT cargo net to get you packed up and on your way with less hassle.


  • EXTENSION. This cargo carrier extension is designed to be used in combination with the CURT car roof rack carrier #18115 (sold separately). It installs easily and increases the usable square footage from 11 sq. ft. to nearly 17 sq. ft
  • ENHANCED SECURITY. This rooftop cargo carrier extension has 4-inch high walls to keep items securely in place during travel
  • EASY TO USE. Adding cargo space to your vehicle is easy with this extension and the rooftop cargo carrier #18115 (not included). It frees up the inside of your vehicle for other cargo or passengers
  • UNIVERSAL FIT. Once installed on the rooftop cargo carrier #18115, the extended carrier securely attaches to most roof rack rails, using simple, universal brackets. This extension piece assembles quickly with no additional hardware needed
  • DURABLE BUILD. This roof rack basket extension is constructed from tubular steel to promote high strength and a lightweight design. It is also finished with an E-coat and carbide black powder coat for long-lasting corrosion resistance
Warning: Cancer and reproductive harm.
More Information
SKU 2020102873
Brand Curt™
Country of Origin CHN
Warranty Term Limited lifetime warranty (one-year finish, one-year parts)
Quantity In Package 1
Unit of Measure EA
Material Type Steel
Product Color Black
Cargo Mounting Type Roof
UPC 612314181179
Manufacturer Reference Number 18117

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