Thule Sonic XL Roof Box

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Slicing through the air like a hot knife through butter, the new Thule Sonic XL roof box features a patented aerodynamic design.

  • 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 one comes with 2 keys
    • Thule Sonic XL roof box holds 6 - 8 pairs or skis or 4 - 6 snowboards

    Made in USA.

    Will this fit your setup? Check the Thule Rack Fit Guide
    View all Thule Cargo Roof Boxes
  • Technical Specs

    Best Use


    Box Opening

    Dual Side

    Gear Capacity (L)

    481 liter

    Gear Capacity (cu. in.)

    29,376 cubic inches

    Ski Load Capacity

    6-8 pairs

    Snowboard Load Capacity

    4-6 boards

    One-Handed Opening


    Internal Straps



    7 ft. 6 in.

    Width (in.)

    34.5 inches

    Height (in.)

    16 inches


    51 pounds

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