A combination of the JUSTOCK 3650SD G2.1 motor and the XR10 JUSTOCK G3 controller, this combo is perfectly matched for the ambitious stock or sport driver. The XR10 JUSTOCK G3 ESC was specifically designed for racing and training rides. This is ensured by the brand new programming option “RPM Limit” to adjust the limit according to the racing requirements – adjustable in steps from 12,500-25,000RPM or also unlimited. In addition, there is the fixed “0” timing, which is often required for races. So get ready for a fair and successful race.