The River Quiver is designed to fit most commercial roof rack systems. In fact, Riversmith engineers haven’t yet found a commercial rack that doesn’t fit. We completed a thorough review of multiple brands and styles of rack to make sure there were no limitations with our product. If the thickness of crossbars is over 1 3/8” it will require extended bolts (Sold Separately). If the crossbars sit lower than average; < 1.5" from top of crossbar to top of roof, it will require shorter bolts (Sold Separately). This is common in earlier generations of the Toyota 4Runner and Honda CRV factory Racks.