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Thule 635B Sonic XL

Attack the great outdoors in stealth and style with the Thule 635B 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's 17 cubic feet of space allow you to bring gear for the whole crew!

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 Black
  • 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 Silver - Thule 635S 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 635B Sonic XL

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