I had a custom sized frame built for me from the German Expert frame builder NICOLAI. 100% Easton Aluminum with a bottom bracket stiffer than a diamond. No carbon frame can match the stiffness of my Argon Road. It is fast...I am clocking speeds of over 75km/S down the hills of Feldberg here in Frankfurt. Negative Gravity Brakes, Easton SL90 Fork, and waiting for my Rotor Q rings(53/39) and Crank set to arrive.