The fizik antares vsx kium saddle versus x took the pressure relief chancel concept of firsquozikrsquos 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 fizik antares vsx kium saddle features shell nylon carbon reinforced rail kium cover