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Always the correct part
We know our products
Quality Products
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Size
Warranty: Limited Lifetime Warranty (One-Year Finish, One-Year Parts)
Color: Black
Finish: BLACK VINYL
Installation Time Exact (Minutes): 0
CURT cargo bags are the ideal way to keep your belongings well protected from water, dirt, road grime and even wind damage, all while being easy to manage and perfectly fitted for a CURT cargo carrier or roof basket. Unlike other cargo bags that use a thin vinyl material, our cargo bags are made from a thick UV-resistant vinyl and have welded seams to be highly water-resistant. Thick, 1" wide polypropylene straps keep the bag firmly attached to the carrier and ensure your belongings will not jostle around. This CURT cargo bag comes with a heavy-duty zipper that wraps 1/2 way around the bag and hook-and-loop flaps to keep the zipper completely covered and the inside of the bag dry. For a little extra security, the zippers are able to be joined together and feature large holes to accept a padlock. This particular CURT cargo bag offers 21 cu. ft. of storage area and is a perfect fit for the CURT roof-mounted cargo basket. All of our cargo bags are easy to fold up for compact storage and come with a limited lifetime warranty.

CURT offers a variety of high-quality trailer hitches and accessories for select vehicle models. Find the perfect fit for your towing needs at TowUniverse.
CURT, a Lippert brand, offers a complete line of towing products and is the leading manufacturer of custom-fit trailer hitches. We offer the broadest selection of custom-fit hitches, and each one is designed, welded, and coated in Wisconsin.
CURT is also a leader in flat towing products, as well as 5th wheel, gooseneck, and weight distribution hitches, ball mounts, electrical components, cargo solutions, and other towing accessories.
For everything from passenger cars and vans to full-size pickups and SUVs, CURT is 'The First Name in Towing Products®.'
Experts available to answer your questions
Call 888-634-9494Rediscover "Us" Time | Tested. Proven. Safe. Towing Products
The Curt 18221 is an expandable cargo bag designed to mount to an existing rooftop carrier. It uses lashing straps to secure the bag to the rooftop carrier's side bars, providing additional storage capacity for travel.
The Curt 18221 is designed to mount to an existing rooftop carrier. The manual does not specify compatibility with particular carrier brands or styles. Verify that your rooftop carrier has accessible side bars to which the lashing straps can be attached, as shown in the installation instructions.
Yes, but you must not exceed the roof rack's rated load capacity. The manual explicitly states: 'Do not exceed the roof rack's rated load capacity.' Check your roof rack manufacturer's documentation for the maximum weight it can support, and ensure the loaded cargo bag does not exceed that limit.
The manual does not specify a maximum weight capacity for the cargo bag itself. You must not exceed your vehicle manufacturer's recommended towing capacity or your roof rack's rated load capacity, whichever is lower. Consult your vehicle's owner manual and roof rack documentation for these limits.
1. Spread the cargo bag onto the rooftop carrier. 2. Unzip and load the bag, placing larger, heavier objects first and smaller, lighter items on top. 3. Close the zipper and pull the flap down to cover it completely. Seal with the provided hook and loop closures. 4. Attach one end of the lashing strap to the rooftop carrier's side bar. 5. Pull the strap through the loop on top of the cargo bag. 6. Attach the other end of the strap to the adjacent side of the rooftop carrier. 7. Take up slack in the straps until the bag is securely attached.
Place larger, heavier objects in first, then continue loading with smaller, lighter items on top to create a compact load. This arrangement helps distribute weight evenly and prevents shifting during travel.
Close the zipper and pull the flap down to completely cover the entire zipper. Then seal the bag with the provided hook and loop closures to ensure the contents remain secure during travel.
Attach one end of the lashing strap to the rooftop carrier's side bar. Pull the strap through the loop on top of the cargo bag, then attach the other end of the strap to the adjacent side of the rooftop carrier. Take up slack in the straps until the cargo bag is securely attached.
Any excess webbing should be tucked away and tied off to prevent flapping while driving. Flapping webbing can be a distraction and may cause damage during travel.
Periodically check the straps during travel to ensure the load is securely held. The manual does not specify an exact interval, but regular checks help prevent the bag from shifting or becoming loose.
No. The manual explicitly states: 'Do not leave empty cargo storage bag on vehicle.' After removing contents, remove the unit from the rooftop carrier and store it for safekeeping.
Examine the general condition of the cargo bag before each use. Keep it in good repair. Have any necessary repairs made by qualified service personnel. Store the bag properly when not in use.
The Curt 18221 mounts to an existing rooftop carrier with accessible side bars. Verify your carrier has side bars for strap attachment.
You need an existing rooftop carrier with side bars. The bag includes lashing straps and hook and loop closures. No additional tools or hardware are required.
Never exceed your vehicle manufacturer's recommended towing capacity or your roof rack's rated load capacity. Do not leave the empty bag on your vehicle. Periodically check straps during travel.
The manual does not specify an installation time. The process involves spreading the bag on the carrier, loading items, closing the zipper, and securing lashing straps to the side bars.
Remove the bag from the rooftop carrier after use and store it for safekeeping. Examine its condition before each use and keep it in good repair.
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Original price was $178.95. Current price is $134.33.




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| Part # | Dimensions | Storage | Straps | Description | Yarn Count | Weight | Thickness |
|---|---|---|---|---|---|---|---|
| 18210 | 56" x 18" x 21" | 12.25 cubic feet | 6 | Cargo carrier bag | 500 denier | 600 grams per square meter | 0.45mm - 0.55mm |
| 18211 | 56" x 22" x 21" | 15.00 cubic feet | 6 | Cargo carrier bag | |||
| 18220 | 38" x 34" x 18" | 13.50 cubic feet | 4 | Roof rack cargo carrier cargo bag | |||
| 18221 | 59" x 34" x 18" | 21 cubic feet | 6 | Roof rack cargo carrier cargo bag |
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