[Lil' Lavery]

Originally Posted by Wayne TenBrink

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.

I disagree on the bolded. In 2014, we noticed a difference in the distance we drove in autonomous on worn wheels compared to fresh ones (and our wear isn't as significant as what was shown in some pictures). The radius change is definitely a relevant concern as the wheels wear.