The Science Behind the Bike is a four part video series from The Open University. The series has a total running length of 33 minutes and is a complement to a larger Open Learn course called The Science Behind Wheeled Sports. The videos and the course are designed to help students understand the physics, the physiology,  and the technology that influence the outcome of cycling events. (I recommend forwarding the first video to about the midpoint unless you’re really interested in the history of cycling races).