Quote:
Originally Posted by GeeTwo
If you only replace one pair, replace the one with less weight (away from the center of gravity). For most robots this year with a convex rectangular base, this would be the rear wheels. We used this configuration for Ultimate Ascent, and we had the two solid wheels in the front and two (idle) omni wheels in the rear.
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We started out with all omnis, but it totally fish tailed. We ended up doing the same thing in 2013 too, although it was 2 omnis on front and 2 rubber wheels on the back (with our butterfly drive). I would definitely recommend using a pair of omnis and a pair of rubber.