Wilsons Sandbox

OK y'all, someone please give me a clue as to what this vibration might be? Here is the question; I recently installed Avon Distanzias, they have less than one hundred (100) miles on them. The last few days I noticed that when I come to a stop, we are talking walking speed, less than 5 MPH, in the last few seconds (and feet) before a stop, I get a mild vibration (more like a rumble) just as the bike comes to a stop. This vibration/rumble only happens just before a stop, I do not notice it as I accelerate. I do not notice it at speed, and can not feel it as I am slowing down, except for the last few second just before a stop? I can also feel it if I do slow S-Turns, very slowly? I checked the obvious, air pressure, and the tires are not rubbing anywhere. The tires seem to be true and balanced, and are wearing evenly, although the latter does not mean much considering they have less than 100 miles. Although the vibration/rumble seems to be in the front, a pal rode the bike and he said that it is a toss up between the vibration/rumble coming from the back? My guess is that it is in the front. And, it does not matter if I am applying the brakes - front or back. I can coast to a stop or be on the brakes, and I still feel the vibration/rumble just prior to a stop. As you might know, the Avon Distanzias do not have any knobs, they are a street tire....... so does anyone have a guess? Eddie M New Orleans