If your worried about breaking wheels you can always switch up to their
performance wheels. Our robot saw just about as much abuse as one robot should ever see this season and the last thing we ever worried about was our drive train. ( performance wheels and a moded set of AM shifters )
I mean you are buying a $12 wheel, only so much performance you can get out of one, and especially with plastic molding and the manufacturing being so crucial it isn't uncommon to see a small mortality rate. Regardless AM seems to do well in keeping this number low. From what I could tell the new kit wheels held up much better than previous years kit wheels.