Fizik antares r3 kium saddlethis fizik antares r3 kium saddle has been intentionally designed wider than the arione range and features a slightly curved profile which offers improved comfort.lightweight and strongthis antares r3 kium saddle features increased weight distribution alongside a host of fizik technologies like the carbon thermoplastic composite shell and kium rail to combine strength and support. Fizik's wing flex gives flexibility where your thighs meet the saddle so you spin in comfort from sunrise to sunset.the chameleonif 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 at shoulders' width apart, you are a chameleon.dagger your degree of spinal flexibility helps you up to a point before you need to rotate your pelvis slightly to achieve fully the performance position. Fizik understands that not everyone has the same level of flexibility so they cater for everyone. You will benefit from the increased width and slight curvature of the antares shape.daggerdon't know if you're a bull, chameleon, or snake? No problem! You can download fizik's handy spine concept evo app and test your flexibility. Simply search for spine concept evo in the itunes app store or google playstore and download it to your device.for assistance on how to use the app, click here.featuresshell carbon thermoplastic composite with wing flexrail kiumcover microtexintegrated clip system yeslength 275mmbuy fizik components from chain reaction cycles, the world's largest online bike store.