Due to the amount of text and pictures I'll publish the story in chapters.

Follow the story!

1.) At a glance

https://hackaday.io/page/10419-1-at-a-glance

2.) The front wheel

https://hackaday.io/page/10420-2-the-front-wheel

3.) The rear wheel

https://hackaday.io/page/10421-3-the-rear-wheel

4.) The bottom bracket

https://hackaday.io/page/10425-4-the-bottom-bracket

5.) The chainwheel (Pt. 1)

https://hackaday.io/page/10435-5-the-chainwheel-pt-1

6.) The gears

https://hackaday.io/page/10470-6-the-gears

7.) The brakes

https://hackaday.io/page/10471-7-the-brakes

8.) The chainring, Pt. 2

https://hackaday.io/page/10478-8-the-chainring-pt-2

9.) Doing small things

https://hackaday.io/page/10479-9-doing-small-things

10.) Summary

https://hackaday.io/page/10480-10-summary