[sdcantrell56]

There is absolutely no reason that a team should be worried about using either #25 or #35 chain on a FIRST drivetrain as long as simple precautions are taken such as proper alignment and tensioning. If the chain is taut and completely aligned there will not be any problems with it breaking. Additionally, it is much more difficult to machine a drivetrain to use gears versus chain and the gears will be much heavier.