Only 19.6 inches usable width. Both of our boards are 11-5/8" wide at the tip and tail. We'd have to stack them on top of each other to fit side by side. Trying to flip two more upside down is totally impossible as the folded fasteners will fall in. btw .M should be 2-3" wider. But L is at least 6" taller for a family of 4. Very disappointing. Not what I expect from Thule. I will be returning this and NOT a one size fits all monster SUV for my elegant one get a small sedan.
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