We want to use 4 20" bicycle tires as our drivetrain. We couldn't find much on wheels in the rules, so I am asking to make sure it is legal.
This is a picture of one of our wheels.
https://docs.google.com/open?id=0BxQ...FlOWE5NmNkZWQ1
^sorry it is a link to gdocs, my schools proxy is mean and doesn't allow access to standard image sharing sites.
P.S. We want to put an empty water bottle on the robot to be a stationary block to stop basketballs. Is it allowed to put a plastic water bottle on the robot? =)