The total size with tire is 14 inch with 2.5-10 off road tire. The motor can run with 48v and 60v battery, and speed will be 45km/h at 48v and 65km/h at 60v. The max current is 25A but it is ok to use a 25-35A controller for it. Pole pairs is 20. It is a good motor to convert gas kids dirt bike to electric.