Ready to build a caterpillar tread drive for your next robot? Here’s a package that makes the job easy. It includes a pair of GM2/3/8/9 style gear motors, two GMTI idlers, two GMTC driver cogs (keyed to fit the GM2/3/8/9), and forty GMT links and pins sets (20 per side).

Get the set, and save more than 20% over buying the parts individually!

Please note that the GM8/9 motors have a shorter shaft length than the GM2/3 and that the treads may rub against the motor body because of this.