If you are looking to find out if a Packasport cargo box can fit on your Tesla, you'll need to pick up a set of Seasucker Monkey bars as Tesla's roof bars are too wide (front to back) to secure the box. So far so good, this setup has some wind noise, but nothing unbearable. The box sits level and the hatch can fully open. This particular box is one of the first built, back when Yakima owned the brand.
Box Dimensions: 90" L x 21" W x 12" D
Learn more about the box here.
https://bit.ly/38SuoJJ