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The Thule Sonic Box combines efficiency with style. It's designed for those looking for an aerodynamic box with a wide variety of sizes and convenience options. The Thule 636S Sonic XXL Silver has a 22 cu.ft. cargo capacity.
Ask A Tech if This Rack Fits Your Car
Thule 636S Sonic XXL Silver Instruction Manual (.pdf)
Thule warranty information.
Below you will find a list of the most frequently asked questions for this product. If you need more assistance you can email a rack-install technician, or call us at:
While the weight limit of your roof rack may differ, cargo boxes can hold up to 165 pounds.
If you drive an SUV or van, probably not. Be sure to measure the total height of the vehicle with the Thule 636S Sonic XXL Silver installed, and keep that information handy (on the inside of your sun visor is a great place). Running into your garage will, unfortunately, void the box's warranty.
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