What did you do to your bike today?

Fantastic. My son got into those over 20 years ago. My wife was upset that one of his designs used a couple of lp's as drivers. (Best use for a Barbara Streisand album if you ask me.)
 
Skate board bearings for the front wheels, an ink pen for spacers. The front axle is a skewer. The back axle a screw with 4 bolts and 10 total washers.
 
Top