[Gabe]

Our team used to use natural rubber for treads but it wore down incredibly fast. We would have to replace them every second or third match. Then we found Nitrile conveyor belting (blue) from McMaster-Carr. This roughtop material is very tough and will oulast many natural rubber treads. The downside is that it has slightly less grip because is is harder and doesn't "grab" the carpet as much as you'd like. For our robot, not needing to constantly worry about the treads was great.

(True story: when our team was at PNW regional last year, we never replaced our tread at all and still ended up first place.)