I measured right at 90 inches. I did not move the tractor onto a concrete or other type solid, even surface. It was parked on solid ground however, and I wouldn't think there would be much difference. I would think Kubota would want to advertise the least height measurement and the ag tractors would likely be taller.
Hope this helps!
Terry
ps I don't have a radio antenna on mine. I would think it would be flexible enough to not matter much in terms of clearance, but it is probably taller than the tractor.