The SCR18R is a brushless dc hub motor with hall sensors, sold with tire together.
This motor is ok to buy directly from online store now, please follow here fat tire motor to buy via paypal.
Motor basic information:
motor rim size: 220mm
motor weight: about 16.5kg
motor dropout size: 257mm
shaft holes for installation: M10
Standard power 60v 1000w, 40km/h.