FYI, here's a picture of the wheels team 1967 broke at SVR.
The one on the right broke in match 28 and prevented us from driving. The middle one is not fully broken yet but has cracks on the spokes where they meet the outer rim so we replaced it. The one on the left broke in the elimination matches and we could still drive because every spoke completely broke so we were driving with 5 wheels.
Overall, we're very happy with the belt drive system, but this year we're able to drive much more aggressively than in the past due to the field and due to our robot having a much lower CG. So, while I think we've never seen anything like this (and we've used these wheels in the past), I also think we're abusing the wheels much more than in past years.
We're definitely considering metal wheels for next year already!
And, we're ordering spares for the championships (which we're VERY excited to be able to attend)!