This 11T Mod1 steel pinion is designed to compliment the BS801-014 Mod1 spur gear upgrade for the Ground Pounder.  These gears can accept brushless power with ease!  This pinion fits all motors having a 5mm shaft.  If you have a 3mm shaft motor, you will also need our CPE-SHAFT53 reducer (linked below).

Note:  This pinion will match up to the 43T Mod1 spur gear and will provide slightly more torque than the stock equivalent 12T pinion.