SportRack by Thule - Car Roof Racks are designed to fasten directly to your factory raised railings. SportRack Raised Railing Roof Racks are available in 47" sr1098 and 53" sr1099 crossbar lengths to accommodate most of today's vehicles. SportRack Raised Railing Mounted Car Racks are ideal for carrying bikes, kayaks, stand up paddleboards, surfboards, windsurfers, canoes, lumber, etc. The SportRack Raised Railing Mounted Car Roof Racks holds up to 150 lbs and do not require drilling to install. All SportRack Products are in stock and ready for immediate free shipping from RackWarehouse.com. Please call us at 800 272-5362 if you have any questions.