[FrankJ]

Since mechanum needs four gear boxes, shifters add bit of weight & complexity. you would want to gear them fast & faster since you are not going to win pushing matches against well built pushers anyway. I don't think shifters would be worth it. They really don't do as bad as most think against the average drive train. Once again I am not talking about winning pushing matches as much as avoiding them. A well driven mechanum with good drivers & a plan can drive around pushing matches. In this game, lining up on the feeder & aiming is a big plus for mechanum.