As Tour de France cyclists switch between screens on their bike computers and pause them as soon as they cross the line, you may have wondered what they're looking at and recording.
To their detractors, the best bike computers make racing more predictable and diminish the breakaway's chances. But they are here to stay despite a recent ruling by cycling's governing body, the UCI. It announced a restriction on bike computer size, in case riders get distracted by the supposed plethora of data at their fingertips.
