The Exploratorium's Science of Cycling website is a another of their sites that deals with the maths and science of sports. 

As flagged before, Exploratorium's Sports Science site contains many pages on which learners can explore the maths and science of team sports as well as the individual sports of, for example, bicycling and skateboarding.

The Science of Cycling has a calculator that learners can use to calculate the aerodynamic drag and propulsion power of a bicyclist.

Visit http://www.exploratorium.edu/cycling/index.html to find out more.