[Jdanke
In normal physics, surface area is not a factor when calculating friction. However, when surfaces have the ability to deform, surface area (more importantly, pressure) does come into play. Moving something accross a hard floor versus the carpet is different.]
Thank you Jdanke, we did understand all of the physics involved and that was exactly why we did, in fact, go with the belts.
http://www.fleef.net/robo/robo2rm.rm <-- you need RealOne player to view
I guess though, that I didn't ask the question clearly enough though; "What was it about the belts that made you shy away from them when you had success in previous years and go to the wheels? Was it the wire on the ramp? Has anyone had problems with their belts on the ramp this year?