The 2005 Seven Cycles Elium SG may be the most comfortable high-performance bike on the planet. This frame is a superlight marriage of buttery-smooth titanium and stiff carbon-fiber tubes tailored and built to your precise height and weight. Watertown, Massachusetts-based Seven can tune the ride characteristics as well, manipulating tubes and angles-stiffer for high-octane racing or more supple for long hauls down country lanes.