100-1/2 x 37-1/2 x 17. This low profile and ultra-aerodynamic cargo box holds outdoor gear and large bags for 5 or more people. Built-in AcuTight clamps let you mount the box to your roof rack in 5 minutes, and the locking lid opens from both sides.
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Please Note: Due to the size of this item, it ships via truck freight.
The Thule Sonic XXL cargo box is the perfect way to carry large grocery trips, visits to the home improvement store, or oversize luggage and sports equipment for 5 or more people on your roof rack crossbars. The extra-large, spacious box provides enclosed storage for your gear on long road trips, extended vacations or trips to a summer home.
Mounting the Sonic XXL is a 5-minute operation thanks to the pre-installed AcuTight hardware. Just throw the box on your roof, center the clamps over your crossbars, and turn the hand knobs located inside the box to tighten them down. The knobs will click once they are appropriately tightened, ensuring that the box is secure every time you mount it on your roof.
These hand knobs are mounted in tracks so that they can be repositioned for vehicles with shorter roofs. Simply slide the hand knobs to the desired position and give them a spin.
The AcuTight assemblies also include anchor points for securing your cargo. Just loop the included cargo straps through the anchor points and pull the straps tight to secure your gear.
The Sonic XXL is designed to be extremely aerodynamic with Thule's patented AeroNose and Hi-Flow Base. The pointed nose reduces drag by up to 35 percent when compared with boxes that have standard shapes. The flat base has channels that let air pass easily between your roof and the box, further reducing drag while also maintaining your vehicle's fuel economy.
The Sonic XXL features a dual-side-opening lid so you can access and load your gear from either side of your vehicle. The rugged lid is reinforced to ensure that it remains easy to open and close over years of use. The lid is arched to match the roofline of your vehicle, and 2 built-in straps make it easy to lift and close the lid.
The cargo box has oversize SecureLocks on each side. These specially designed locks prevent you from removing the keys if the box is not properly closed and locked. This eliminates the possibility of the box coming open as you travel down the road. And the locks include Thule One-Key-System cores so you can swap them out to make all your Thule accessories keyed alike.
The Sonic XXL features Thule's patented rear-angled base. The undercut back of the box is designed specifically to prevent interference with your vehicle's trunk or hatch door. This means that you can load and unload your cargo area without having to remove the box from your roof.
This cargo box is constructed of rugged, 5-layer ABS plastic with an acrylic cap that resists impact, weather, and harsh UV rays. There is an anti-torsion rib built into the lid that helps the box to resist lifting and pulling forces that could cause it to contort over time. The rib ensure that the lid holds its shape so that it's always easy to open and close. And the high-gloss automotive finish adds a touch of class when the box is mounted on your roof.
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