Specialized Aethos Expert 2 – Shimano Ultegra Di2 – Roval Alpinist Wheels Lightweight, responsive, and comfortable, the Specialized Aethos Expert 2 is designed for cyclists seeking performance and enjoyment on all terrains. Equipment: FACT 10r carbon frame Shimano Ultegra Di2 2x12 speed drivetrain Shimano Ultegra hydraulic disc brakes Roval Alpinist carbon wheels Bike fully checked and ready to ride Available at Castella Sports in Bulle.