Lol, they only wear out on robots that insist on trying to push people around the arena and when they cannot push them they sit there and smoke the tyres, draining the batteries and getting the speed controllers hot for now reason Tim has had 4 of them on KO and I believe he is yet to change them, and his machine is a pushbot from hell.

The ones we have on Annihilation have lasted over 12 battles and have only lost 1mm from when I was forced to play pushy bot