Superlight full carbon fiber rails with oval section (9,8 mm x 7 mm) with PATENTED DNA (Dynamic Node Action) technology which prevents twisting and keeps the front of the saddle narrow for great pedalling freedom. It makes the Carbon fiber rails even stiffer and, give to the central geometry a longer section to ensure more extensive saddle adjustment. This Rails is used on Superleggera and Carbon FX saddles. An adaptor might be required with some seat posts.