Fizik aliante r1 open bike saddleenjoy unrivalled comfort with the aliante r1 open bike saddle from fizik. Designed with a waved shape, and made from a carbon reinforced nylon shell, it features comfort core foam padding to help keep your sit bones in check. It also includes a central cut out to ease pressure on your perineum on long distance rides. Spine concept evothis saddle is categorised as a bull type within fizik's spine concept system, which means it's ideal for riders with less spine flexibility and those that rotate their pelvises a lot when pedalling.a high quality carbon reinforced shell isnt the only major plus point with this saddle, it also has braided carbon rails. These rails are strong and lightweight and combine with the shell to give you optimum pedalling efficiency.don'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.features open central cutaway integrated clip system compatible use road, mountain bike mtbcover microtex shell carbon reinforced nylon padding comfort core foamrail 7x9mm carbon braided dimensions regular 275x143mm large 275x152mm weight regular 199g large 205gbuy fizik components from chain reaction cycles, the world's largest online bike store.