Brooks C13 Saddle- Carbon Black 145mmBrooks C13 Saddle Carbon Black 145mm. C13 utilizes the same vulcanized natural rubber and organic cotton top of the Cambium line yet weighs less than the popular C15 model. Cambium A new generation of saddles that offers a natural feel and flexibility unlike any foam or gel saddle on the market TECH SPECS Length 275 Color Black Rail Material Carbon Saddle Cut Out No Width 145 Material Rubberized Clamp Style 7x9 Carbon Rails