High-efficiency, lightweight XERUN 4.5T brushless motor, perfect for RC cars. - Model: XERUN 4.5T - Type: Brushless motor - Features: High efficiency, lightweight design - Application: For RC cars Thank you for viewing. The above description was automatically generated. I purchased a seemingly well-maintained item on Mercari and used it for only one pack (5 minutes), but it was too fast for me to handle, so I am selling it. The rotor appears to have been replaced with a 12.5x7x25.2 rotor.