Thule Hull-A-Port Aero 838 The spring-loaded hub system makes it easier to reach and fold down the carrier for improved fuel economy Sure Grip padding on both the base and mast conforms to the hull and protects the kayak during transport Corrosion-resistant steel tubes that fold make the carrier durable and more aerodynamic Includes QuickDraw bow and stern tie downs and two center straps with car-protective buckle bumpers Fits Thule rack systems, round bars and most factory racks with both T-track and around the bar mounting options