Today, on a 2013 Subaru XV Crosstrek, we'll be testing in the Thule Sonic Medium Rooftop Cargo Box measuring 13 cubic feet in glossy black, part number TH634B. With the Thule Aeroblade roof rack system assembled onto our vehicle, we'll begin by placing the Sonic directly onto our load bars. Once we have it situated the way we like, we can also, in the passenger's side of the box, and use the hand… see more >