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Re: "W" Drive Versa Wheels
We have used them since 2014 and are inclined to use them again if they suit the game. In 2014 we replaced them about once per competition. In 2015 we ran the same set all season.
They don't get meaningfully smaller as they wear, but the sharp edges get rounded off and the CoF drops, requiring replacement (if you want to do well in a shoving match). We found that the tread tips on the corner wheels (8WD) wore in a "sawtooth" pattern, so we would swap them out end-for-end to stretch a few more matches out of the set.
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NC Gears (Newaygo County Geeks Engineering Awesome Robotic Solutions)
FRC 1918 (Competing at Standish and West MI in 2016)
FTC 6043 & 7911 (Competing at West MI and Allendale in 2015)
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