Versus x took the pressure relief chancel concept of fiziks successful versus saddles and expanded it further with a channel design that has a smoother more ergonomically shaped profile that improves comfort and relieves the sensation of pressure versus x feature a channel width up to 30mm and depth up to 20mm for optimum pressure relief the edges of the central channel have been rounded to prevent any discomfort in this area aliante vs x is for the bull rigid spine if you have a relati