Drive System/Frame questions

[Chris is me]

You already have 90% of the Kitbot on Steroids parts. Try it!

[Hawiian Cadder]

As far as wheels go, we have used both 8 and 6 inch wheels recently, and we have some examples of older robots with 4 inch wheels around our shop. I really loved the 6 inch plasticion wheels that we used this year, they were light, durable, and Grippy. I don't think that any of the plastic or omni wheels from andy mark are very good in the 4 inch size when used with dead axles, the rim around the bolt circle makes it difficult to keep the wheel + sprocket assembly compact in a dead axle system. If you are using live axles and have an effective method for driving them, then as small as you can go is fine.