[Qbot2640]

While everyone posting here may be correct - I would venture to say that your light weight is just as much the cause of the problem if you are truly as defensive as you claim. Pushing force is a function of coefficient of friction, weight, and motor strength. Our kitbot wheels did a pretty good job pushing a defensive robot around in our last match (didn't work, because we were pushing back instead of scoring - but it felt good) but I did see some wear on the dropped center wheels as a result. We're not changing wheels before DC...but we'll take spares for the center pair.