Specialized S-Works Carbon Rib Cage IIIThe Specialized S Works Carbon Rib Cage III keeps the 100% FACT carbon fiber construction of yesteryear, but it ups bottle retention for super rough roads. The split design also provides pre load to hold bottles securely, while makimg bottle entry as easy as possible. Details FACT carbon construction for a perfect fusion of strength and lightweight SWAT technology design allows for storage and tool integration Super low bottle position improves