Today on our 2013 Toyota Prius, we'll be test fitting the Thule Sonic XXL rooftop cargo box, measuring 22 cubic feet, in metallic silver, part number TH636S. With the Thule Aeroblade roof rack system assembled onto our vehicle, we'll begin our test fit by placing our cargo box directly onto our load bars. With the feet hanging out of the bottom of the box, we'll adjust them as needed to fit… see more >