It has been posited that the heaviest cyclist is the Pachyderm. This sliding measurement comes to the intertube from the site, SuperClydesdale. The Pachyderm is the cyclist weighing in excess of 220 pounds. The pachyderm is constantly faced with the limits of technology. Whether it is the tensile strength of spandex stretched to the point of flames or the torsional strength of carbon wheels, the big cyclist is a force in and of nature. This fact was visualized in 1894 by some lardass named Byron.