1. Mark a spot (start position) on the floor (using a tape or a chalk line).
  2. Place the front wheel with the valve being exactly over the start position.
  3. Roll out the front wheel until the valve is in the same position as it was in the start position. Mark the position of the valve on the floor.
  4. Measure the distance in between the two marks. The difference in mm corresponds with the circumference that has to be entered into the smartPulse app.