Wheels look simple, but they decide how a robot turns and how much current the motors draw.
Wheels look simple, but they decide how a robot turns and how much current the motors draw. Soft rubber wheels grip well. Hard plastic wheels slip. Oversized wheels add speed but reduce torque.
For beginners, two drive wheels plus a caster is easier than four-wheel skid steering.
For beginners, two drive wheels plus a caster is easier than four-wheel skid steering. Mecanum and omni wheels are useful but add control complexity.