A bicycle comprises a bicycle frame and a rear wheel suspension system that is attached to the frame. Upon a change in operational condition of the HDD, biases are measured at two reference positions on the disk so as to estimate a corresponding change in a linear bias component across all zones of the disk. The system comprises an imaging device for acquiring the image data and an image process configured to segment, extract and mathematically model disease relevant features. The processing system is further configured to receive a user input from the input device in response to the graphical bandwidth selection indicium. This avoids many of the problems caused by long lines, such as increased cache-to-cache copy activity.