[EricH]

Originally Posted by Marc S.

Yes they don't need chains or sprockets, but they are still larger and very heavy. The larger diameter the wheel, the more force you need to excelerate regardless. Add weight and the required force goes up even further.

Mecanums aren't larger in diameter than most wheels. They're larger in the axial direction. (Now, if you use 4" wheels, you might think that mecanums are larger, but most teams use 6-8" wheels.)