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Slicing through the air like a hot knife through butter, the new Thule Sonic XXL roof box features a patented aerodynamic design and plenty of room to haul your gear on any road trip.

  • Features

    • Front of cargo box features a patented AeroNose design that is pointed so box cuts through the air, helping to reduce drag and noise
    • Rear of cargo box also features a patented rear-angled base design, helping to maximize trunk and hatch clearance
    • Mounting system clicks when you reach the optimal hold, so you'll be on the road in seconds; can be mounted on square and round crossbars and most factory racks (see Fit List)
    • Patented, dual-side openings let you access your gear from either side of the box
    • Locking system features an external lock-assist knob that is easy to use; built-in safety feature means the key can only be removed when the box is fully closed
    • User-friendly locking system includes an oversize key; a lock is located on each side of the box, and each lock comes with 2 keys
    • Thule Sonic XXL roof box holds 10 - 12 pairs of skis or 6 - 8 snowboards

    Made in USA.

    View all Thule Cargo Roof Boxes
  • Technical Specs

    Best Use


    Box Opening

    Dual Side

    Gear Capacity (L)

    623 liter

    Gear Capacity (cu. in.)

    38,018 cubic inches

    Ski Load Capacity

    10 - 12 pairs

    Snowboard Load Capacity

    6 - 8

    Internal Straps


    One-Handed Opening



    8 ft. 3 in.

    Width (in.)

    37 inches

    Height (in.)

    17 inches


    61 pounds

  • Reviews
    3 reviews with an average rating of 4.3 out of 5 stars

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