Bigger in size and with more torque these 24V metal brushed DC gear motors are suited to medium size robots. Available in different gear ratios and with/without encoders.
The output shafts are a D shaft shape making it easy to attach a wheel and lock it in place with a press fit or a locking screw. Power leads can be soldered easily to the tabs at the back of the motors.
Specifications for speed and torque at given for the output shaft of the gearbox.