For anyone considering the use of omni wheels on their robot, Andy Baker put out a great white paper on how team 45 made theirs and it has all the specs you need to make a great pair yourself. We on team 177 used a slight variation of these wheels on the back of our robot (we kept pneumatic tires on the front) and they allowed for excellent turning. Despite what people say you do not need at least 3 of these wheels by any stretch of the imagination. We recieved many comments from people attending the Philly regional and nationals that they thought we would be very easy to push out of the way with omni wheels and that they were surprised to see us do all of the pushing. If you saw any of our matches you know that defense was a big part of our game, and these magnificent wheels made that possible.
http://www.chiefdelphi.com/forums/pa...le&paperid=226