Thule 635S Sonic XL

Attack the great outdoors in stealth and style with the Thule 635S Sonic XL cargo box atop your vehicle. The high-gloss automotive shell adds great fit and finish while SecureLock ensures your equipment is always safe.  The Sonic XL is a medium sized cargo box with 17 cu. ft. of space, allowing for excellent gear capacity while still fitting a wide range of 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
  • 17 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: 89" x 34" x 16"
  • Internal Length: 81" or 206cm
  • Maximum Ski Length: 201cm

Also available in Glossy Black - Thule 635B Sonic XL 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 635S Sonic XL

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