Heres some picture of one of my project : robot track system.
The idea came from an other instructable I seen on this site, and decided to make mine.
First, if you want to build yours, youll need this:
10 feet of #40 chain
2 inflatable wheel of 8 inches
150 inch of aluminium angle, 1/2 inch
22 inxh of aluminium rectangular tube 2X3
22 inch of <checker plate> of 2 inch wide
This project cost me around 50$
Next thing I will add to this project is a motor, sprocket and an armature to put on a robot.