Fizik aliante vsx carbon braided saddlethe versus x saddle takes the level of comfort one step further for the vs range the central channel design has a more ergonomic shape with additional padding which relieves pressure even more the versus x has a maximum channel width of 30mm and depth up to 20mm for optimum pressure relief the aliante vs xs carbon braided rail reduces weight and increases saddle stiffness aliante vs x is for the bull rigid spine if you have a relatively low degree of s