[EricH]

Originally Posted by nlknauss

Unfortunately, we don't have the option to really change the wheels out on our bot because this was a our rookie year. So we only have a few rover wheels in the library.

http://www.andymark.biz/08firstwheel.html

I'd get a set of those, just for carpet-only practice--and for parades. They should fit where the rover wheels do with no extra hardware.