Yakima 8001157 Heavy-Duty HD 60″ Medium Aluminum Crossbars are strong, rugged and ideal for carrying heavier loads of kayaks, bikes, lumber, ladders, roof-top tents and just about anything else. Yakima Medium HD Crossbars are lightweight, powder coated aluminum to endure the harshest elements. Integrated tie-down points are built into the crossbar end caps. Yakima HD Crossbars are rated to carry up to 500 lbs on-road and up to 300 lbs off-road. T-slots along the top and bottom of the crossbars simplify attaching accessories and carriers. Yakima StreamLine or HD Towers are required to attach the crossbars to your vehicle.