Ready to build a caterpiller tread drive for your next robot? Here's a
package that makes the job easy. It includes four GMTC driver cogs (keyed to fit the GM2/3/8/9), and forty
GMT links and pins sets (20 per side).
Also note: The cogs have an extremely tight fit on the GM8 & GM9. You may
find filing the gear motor output shaft down a wee bit a huge help to mounting
the cogs.