All the pictures and calculations were done by myself.
While I do explain how a bike can get moving so fast, I don't much cover how bikes keep going.
If you are interested in that, I highly recommend this page:
http://theconversation.com/how-does-a-bike-stay-upright-surprisingly-its-all-in-the-mind-59829
Thank you for reading, here are the sources I used.

Kidd, M. D., N. E. Loch, and R. L. Reuben. "Experimental examination of bicycle chain forces." SpringerLink. Kluwer Academic Publishers, n.d. Web. 23 Apr. 2017.
https://en.wikipedia.org/wiki/Bicycle_gearing
http://www.bikemag.com/news/exclusive-war-of-the-wheel-sizes/#yDI3TERsftB0AX3o.97
http://www.cyclingweekly.com/news/product-news/are-shorter-cranks-better-188288
https://sporttracks.mobi/blog/theoretical-building-blocks-gearing