25 or 35 chain?

[Maxzillian]

I would suggest to stay with the #35 chain. In last years competition, we were knocked out of a semi final (were selected by another team) from snapping a chain in two. We also snapped another during testing phases, but blamed it on the drivetrain's assembly. Although we did have suspicion of the sprockets flexing a bit, putting the chain out of alignment. But none the less, I suggest you stay with the bigger chain.