The Specialized Crux Expert Shimano GRX Di2 is built for riders seeking a lightweight, high-performance gravel bike that combines speed, versatility, and confidence over mixed terrain. Its ultralight carbon frame, inspired by the breakthroughs of the Aethos, allows the Crux to climb effortlessly, accelerate smoothly, and float over rough gravel or challenging off-road sections. With performance gravel geometry and race-influenced fit, the Crux delivers responsive pedaling, supple comfort, and precise handling, making it equally capable on fast gravel rides or long endurance adventures. Equipped with Shimano GRX Di2 1x12 800 Series wireless electronic shifting, the Crux Expert ensures smooth, precise gear changes under any condition. Lightweight and durable Roval Terra C Disc wheels paired with 2Bliss Ready 700x40mm Pathfinder tires provide traction, stability, and confidence across unpredictable surfaces. With clearance for up to 47c tires or 650b x 2.1", this gravel machine is ready for any route you can imagine, blending capability, speed, and control into one ultra-lightweight package. Key Features Ultralight Carbon Frame - Inspired by Aethos technology for a responsive, climbing-friendly, and comfortable ride Shimano GRX Di2 1x12 - Wireless hydraulic groupset delivers precise, low-maintenance shifting in all conditions Gravel-Ready Wheels & Tires - Roval Terra C Disc wheels with 2Bliss Ready 700x40mm Pathfinder tires, plus massive tire clearance for versatility