The Fizik Antares R3 Road Saddle provides the perfect fit for all riders with both a 142mm option and a 152mm option available. The Antares is 1 of fi’zi:k’s 3 Spine Concept™ Mens Road Saddle shapes. Of these 3, the Antares shape is wide and slightly curved in profile. If you have an intermediate degree of spinal flexibility (approximately 90 degrees between your straight legs and your back when bending over as far as you can, keeping your legs straight a shoulders’ width apart), you are a chameleon. Your degree of spinal flexibility helps you so far, before you need to rotate your pelvis slightly to achieve fully the performance position. Fizik Antares R3 Road Saddle Features Shell: Carbon Thermoplastic Composite with Wing Flex™ for freedom of thigh movement Rail: fi’zi:k kium  Cover: Microtex Thigh Glides: Microtex Integrated Clip System: Yes Length: 275mm Width: 142mm (regular) / 152mm (large) Weight: 200g (regular) / 205g (large)