Antares versus kium team edition saddlethe vs saddle design has a 7mm channel in the centre for relieving pressure keeping your ride comfortable whilst still being stiff and durable the solid base of the saddle keeps the saddles structural integrity in place as the relief channel spans the entire length of the saddle platform the antares vs kium rail reduces weight and increases saddle stiffness antares vs is for the chameleon medium spine if you have an intermediate degree of spinal flexib