A tire fitting system and a method therein for assisting in fitting a tire on a rim of a wheel prior to assembly of the wheel on a vehicle is provided. The tire fitting system comprising a processing circuitry configured to determine a location of a RFID tag on the tire of the wheel, determine a location for an air valve on the rim of the wheel, determine the distance between the location of the RFID tag and the location for the air valve on the rim, and provide instructions for aligning the tire on the rim based on the determined distance between the location of the RFID tag and the location for the air valve on the rim.