Universal roof rack cross bars for vehicles with raised side rails, designed to fit a gap of up to 49.5 inches between the rails. The cross bars use an integrated T-slot system that works with bike racks, luggage racks, and kayak racks for quick, secure mounting. - Compatibility and mounting: Fit most vehicles with raised side rails and a gap up to 49.5 inches. The T-slot design allows fast interchange with different racks for bikes, luggage, and kayaks. - Materials and capacity: Made entirely from lightweight aluminum for strength without bulk. Load capacity is 200 lbs. The connection to the vehicle uses high quality plastic that is strong and car-friendly, helping prevent damage. - Easy installation and security: Includes the necessary installation tools. No assembly required; follow the instructions or installation video to install and remove quickly. Built-in locking system on the cross bars helps deter theft. - Aerodynamics and design: Fully enclosed aluminum profiles with rubber strips to improve wind resistance and reduce wind noise. The cross bars are streamlined and sporty, designed to work well with a variety of roof rack configurations. - Practical use scenarios: - Family road trips: Carry luggage, camping gear, and other cargo on the cross bars to free interior space. - Cycling excursions: Attach bike racks to transport bicycles securely. - Water sports trips: Use kayak racks to load and transport kayaks or other watercraft.