I have recently measured the tt and it is about 4 to 5 cm longer than the seat tube. The stem is about 80mm by my measurement. I will say that I was surprised by the longer length of the tt. I have been thinking about getting a taller stem to get the bar height a little higher so I could also get it a little shorter reach. I do have the seat adjusted toward the front. The old girl rides good and quite responsive for a sport tourer. There is more weight on my arms and hands than I currently prefer. 30 years ago the weight on my arms was not a problem but I was several pounds lighter in them there days.