Thule 636S Sonic XXL

Being one of the largest and most aerodynamic cargo boxes on the market, the Sonic XXL will allow you carry all of your toys with style and ease.  Load all 22 cubic feet of the box from either side of your vehicle and be rest assured that your cargo will be safe with the oversized SecureLocks that are integrated into this box.  The AcuTight mounting system will have you loaded and on the road in minutes, just twist the knobs until they go "click".  Plus, its high-gloss automotive finish, available in black or silver, is a flattering accent to any newer vehicle.  Because of its size this box works well with larger vehicles.

Availability: Out of stock

Sorry, this item is out of stock or no longer available. Please contact the shop if you have any further questions.



  • Finished in Glossy Silver
  • 22 cubic feet of storage space
  • Dual-side opening for quick and easy loading/unloading from passenger or driver side
  • AcuTight mounting system produces an audible click when box is properly tightened and secured
  • Exclusive AeroNose design reduces drag and noise while driving
  • Oversized SecureLock system ensures a tight and secure closure
  • Fits Thule rack systems, round bars and most factory racks
  • External Dimensions: 99" x 37" x 17"
  • Internal Length: 91.5" or 232cm
  • Maximum Ski Length: 227cm
Also available in Glossy Black - Thule 636B Sonic XXL Cargo Box
NOTE: Cargo boxes must be shipped "Freight Carrier". Please allow up to 2 weeks for delivery


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Installation Instructions PDF
Thule 636S Sonic XXL

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