In my case, the cylinder isn't touching the floor in a hard surface, but is only 1 inch (2.5cm) from the floor, is too low, and i compared the chair with the ones in videos and pictures, and it's a difference about 5cm of heigh bethween my chair and the other chairs. That difference is what i need to be confortable with my desk.
(I attach a picture of the cylinder of my chair and the distance from the floor)