This basket fits the roof racks on the 850 series and possibly all series from 740 through 960. May fit other cars's roof racks as well. It clamps onto the roof rack bars and increases the capacity of the roof racks. Adjustable so that all bars lay flat, or that either/both ends can be raised to give a 2" lip to secure boxes to. Rack clamps will fit on any cross bar that is 1" high and 1.25" wide. Distance between clamps (side to side) is 37"cc. Clamps are adjustable front to back to a maximum of 36" between cross bars.