"Revolution" turns your bike wheel into a rolling stamp. The stamps are 3D printed letters to clip on your wheel with a cable tie. Push the inking roll against the wheel to ink the letters and leave your message on the pavement. You can easily customize and 3D print all the parts you need in the closest Fablab.
"Revolution" is part of streettoolbox.com, a collaborative platform for activists exploring new ways of public expression. You can find more information about the project on http://streettoolbox.wikia.com/wiki/Revolution
Step 1: What you need
Pretty much everything you'll need will be 3D printed. The materials they usually use (PLA and ABS) are a bit too hard for the ink to really work for stamping. The good news is the guys from Fenner Drives have created a softer 3D printable material they call NinjaFlex. This PU-based material will transfer ink much better.
So you need:
- a 3D printer (I used an Atom)
- some NinjaFlex for the stamps (I bought it here)
- some regular ABS or PLA for the inking system (I bought it here)
- 2 long M5 bolts longer than 50mm and 2 nuts
- 1 regular inking pad (bought mine at Rymans)
- plenty of cable ties (bought at Maplin)
- a nice bike
- a good message
Of course you can have a look at the closest Fablab around you to order your prints from them. The stamps take minutes to print so it should be super cheap.
Step 2: Printing the inking system
Go on Thingiverse on this page: http://www.thingiverse.com/thing:367674
Download the 4 files and print them with PLA or ABS.
Then cut a 3mm wide strip on the ink pad and wedge it inside the roller.
You can then assemble the different parts together, and mount them on your bike using two cable ties.