Bicycles Plus Kestrel 2014 4000 Dura Ace Di2 Matte Silver/White 99% Assembled Aerodynamic tubing designed in the A2 Wind Tunnel for maximum speed 800K high-modulus carbon fiber frame and fork for a stiff, stable and extremely comfortable ride Internal Teflon cable routing for easy cable installation and smooth shifting Adjustable rear dropouts allow for a greater range of wheels to be used and enable the rider to fine-tune wheel placement for improved aerodynamics 99% assembled, ready to ride