[KrazyCarl92]

I would aim to use the same wheels in all matches regardless. If I were to consider using the black wheels (unlikely that it would be cost effective to use the blue ones in a drive train application), I would make sure a design criteria be to swap in new wheels in 6 minutes, including bumper removal and replacement. If that's not achievable, I would probably go for white wheels instead.

Based on past experience, I personally would avoid using the 6" wheels at almost any cost. In 2013, we saw many of these fail under conditions which we would expect a wheel to just work. Most notably when Team 20 broke 1 in our first match at IRI which was the likely cause of critical drive gearbox damage, rendering us that team that couldn't move at IRI for 6 matches. We discovered there to be voids in the molded polycarbonate spokes which allowed the wheel to rip itself in half.

The 2014 and 2015 Kitbot used the white 4" wheels. Based on not witnessing many failures in either of these years (especially with the heavy defense in 2014), I would be much more at ease with using these wheels. Anecdotally, they have proven to be more robust.

Should a design call for larger than 4" wheels, I am not sure what direction I would suggest. Banebots doesn't carry colsons larger than 5", and VexPro has limited options above 4" (some traction treaded wheels are available). Maybe the AM 8" pneumatic wheels would be a desirable choice.