Notes: "T" stands for the number of turns. Need to cut a post to mount the battery to use a longer 050 motor.Features:High torque magnet and rotorTuned for rock climbingUpgrade motor parts for Axial SCX24030 motor specifications:Include: 88TWaga: 12g Rated voltage: 7.4V Total length: 20mm/0.79 inchOutput shaft length: 5.1mm/0.02 inchOutput shaft OD: 1.5mm/0.06 inch050 Motor specifications:Power on: 66TWaga: 19g Rated voltage: 7.4V Overall Length: 28.5mm/1.12in Output Shaft Length: 4.9mm/0.19in Output Shaft OD: 1.5mm/0.06in050 Pro Motor Specification:Turn on: power container rolling the device "unknown torch" with extra heavy duty specifications: capacity about 50TWaga: 22g Rated Voltage: 7.4V Total Length: 28.5mm/1.12in Output Shaft Length: 4.9mm/0.19inOutput Shaft OD: 1.5mm/0.06inIn No Load:Speed: 25500rpm Current: 0.36What are the 050:1 engine updates. The motor shaft is shorter than before to make sure it does not touch the gearbox cover.2. After testing, we adjusted the motor speed to make the motor more compatible with the SCX243. Improved material makes the engine run better4. Heat dissipation is improved, extending the life of the motor.