TC200 model: At their highest point, the treadles are 17 inches from the floor (43 cm). Add that to your height, plus a couple inches for comfortable clearance, to calculate your minimum ceiling height. TC100 model: At their highest point, the treadles are 14.5 inches from the floor (36.8 cm). Add that to your height, plus a couple inches for comfortable clearance, to calculate your minimum ceiling height.