This "030" form factor motor replaces the old Mabuchi FF-030 we used to stock, and is still a good candidate for torquey Solarengine and small battery-powered robots.
Need more power out of your gear motor? This is a high-power motor that fits in the same form factor as used by the GM2/3/8/9 style gear motors.
The GWS S03N servo is a good, solid workhorse if you have a need for inexpensive reliable servos.
Auxiliary mounts for the GM2/3/8/9/17 gear motors. Image shows each side of wheel (not sold in sets of 2)