The antares is 1 of fi39zik39s 3 spine concept mens road saddle shapes of these 3 the antares shape is wide and slightly curved in profileantares r3 is for the chameleon medium spineif you have an intermediate degree of spinal flexibility 40approximately 90 degrees between your straight legs and your back when bending over as far as you can keeping your legs straight a shoulders39 width apart41 you are a chameleon your degree of spinal flexibility helps you so far before