The patented I-Beam system replaces the traditional saddle rail design with a single carbon composite beam. The benefits are a dramatic reduction in weight, 200% more foreaft adjustment, and superior strength. Dahon collaborated with Kore to develop their own custom saddles and seatposts. 27.2 x 350mm (For Compact bike models like Hammerhead) NOT SUITABLE FOR ANY OF THE SMALL WHEEL MODELS Supplied in Silver. SADDLE IS NOT INCLUDED.