Today on our 2015 Mazda CX5 we'll be test fitting the Thule Sonic Medium Rooftop Cargo Box with 13 cubic feet of space in glossy black, part number TH634B. With the Thule Rapid Traverse Roofrack System on our roof we'll begin our test fit by placing the cargo box up onto the vehicles crossbars. After positioning the clamps to fit over the bars, we can unlock the box and open the lid exposing the… see more >