He is arguably the most renowned and successful physicist of all times. Einstein is also known to spend time on various leisure activities such as cycling, fishing, and sailing. He also has a few quotes on these activies and let me share the ones on cycling: "Life is like riding a bicycle. To keep your balance you must keep moving." "I thought of that while riding my bicycle." (on the theory of relativity)lbi.org - Albert Einstein is riding bicycle in front of Ben Meyer's House; Santa Barbara, California. 1933.
Early in his schooling at Munich University in Germany, he would take bicycle tours with fellow scientists to contemplate the world at large. And during his final years, while at Princeton University during the early 1950s, when the automobile was the mode of transportation du jour, Einstein chose his trusty steed over any other modern engineering marvels. (Source: ibike.org).