Take a GM8 gear motor, add a LARGE diameter wheel, and you've got a powerhouse combination that can take on any regular servo!
This injection-molded ABS wheel was designed specifially to fit the double-flat output shaft of the GM gearmotors.
What is really cool with this new design is the inclusion of a 64 strip pattern designed to match the popular "Wheel Watcher" optical encoders. Just paint in every other stripe pocket, and you're ready to go!
The hubs are 69mm (just under 2-5/8"), by 7.62mm wide (0.3"). Weight: 0.53oz per wheel.