Feel the difference X makes. Featuring select components specific to performance on even more varied terrain, the Sirrus X is the next generation of lightweight comfort and speed.Specialized Sirrus Carbon Review Alluring in aesthetics but even more superior in performance, Sirrus X excels on pavement, dirt, and any terrain in between. Meticulously crafted with performance features and a comfort-focused design, Sirruslightweight carbon frame includes our Compliance Junctionenabling a new degree of handling thats completely unconventional in such a comfortable bike. For riders looking to push their limits and go beyond the pavement, the Sirrus X features wide tires and large disc brake rotors that slice through gravel and dirt with precision and comfort. For those who prefer the long way home, Sirrus X 5.0 doesnt come up short. Rider-First Engineered: Like all Specialized carbon bikes, the geometry of each frame is uniquely crafted. This means that for every frame, each tube size