Aliante saddles are the widest and most longitudinally waved of fi'z k's trio of pro-cyclist-developed Spine Concept models. Aliante R1 is light, flexible and agile, enabling you to perform at your optimum. It's designed for pros, with pros and raced by pros. It features a composite carbon co-injected shell for the best support with optimized stiffness to-weight construction with Twin Flex technology which combines a song, stiff carbon layer with a flexible, comfortable carbon layer and a Carbon Braided rail for light weight and strength. Made for Bull. Shell Composite carbon co-injected Nylon TwinFlex. Cover Thermowelded Black Gummy Microtex Rail Carbon Braided 7x9 mm Scuff Guards White Weight 180 g Dimensions 275x152 mm Integrated Clip System compatible