This is the Tekin Redline GEN3 17.5 Turn RPM Version Brushless Sensored Motor.                                                                                  FEATURES: 
          RPM version designed for applications where higher RPM is more benefical than torque                                                         Ideal for 1/12 and touring car racing classes                                   CNC machined T 6061 billet aluminum heat sink can                               For on- or off-road use                                                         12.5mm performance rotor                                                        Dual-plug sensor wire harness for all sensored and sensorless systems           Anodized end-bell plates maximize corrosion and wear resistance                 High RPM precision ball bearings                                                Neodymium sintered magnet                                                       Rebuildable                                                                     Adjustable timing                                                               Low resistance solder tabs                                                      Solderless sensor PCB replacement                                                                                                                     INCLUDES: Redline GEN3 17.5 Turn RPM Brushless Sensored Motor with Sensor Wire                                                                                  SPECS:    Input Voltage: 2S all, 3S-10.5 and up                                              Shaft Dimensions: 3.2mm (1/8") x 15.3mm                                            Weight: 5.6oz (158g)                                                               Motor Diameter: 1.40" (35.85mm)                                                    Motor Length: 1.9" (48.5mm)                                                        Bearing Dimensions: Front: 4x13x5mm / Rear: 1/8x3/8x5/32"