[Abby341]

Tank drives often opt. for wheels with higher traction, their almost always round, nothing too special about them, they are better for pushing . Omni wheels are just round wheels with smaller wheels laying perpendicularly on the wheel it allows for easier turning. Mechanum wheels look like wheels are slicing into the larger wheel, they are supposed to make changing directions easier, they are the most obscure looking out of all the wheels. Drop center drives are fairly common, wheels are slightly lower in the middle making turning tighter.