This is as aerodynamic and efficient as a road bike gets. The radically shaped down tube, head tube, chainstays, seatstays and fork—all meticulously constructed from UHC Advanced carbon fiber —slice through the wind like nothing else available. Felt’s Modular Monocoque Construction lends the AR3 a lightweight, snappy feel for climbing and accelerating. Shimano Ultegra Di2 electronic shifting and Mavic wheels ensure reliable performance on every ride.