Revolutionary patented Vector Evo rail increases comfort, durability and adjustment range. Flat profile across the back of the saddle and also flat profile front-to-back makes the Streem a great fit for riders who like to move around on the saddle a lot. Thin padding profile. Flat, low profile shape with superlight foam profile. Carbon reinforced thermoplastic rail works with Vector Wing system to distribute stress and manage shell flex. Superior compliance over traditional carbon rail saddles. Rail material has qualities that absorb energy and diffuse stress. Precisely tuned lateral flex allows the saddle to follow the rider’s natural pedal motion. Narrow clamping zone increases pedaling clearance. Reverse hammock rail shape resists “sag” found in other saddles after long-term use. For use with the versatile Ritchey LINK seatpost system. Vector Evo Clamp included.