Saturday I hit something on the road that punctured my rear tire while crossing a bridge. Coming off the bridge, The bike wobbled a little, but I thought it was a cross wind (common in that area). Now when I recieved the puncture I was moving at about 40 mph. At the bottom of the bridge I was at about 60 mph. Still not sure that anything was wrong I continued on maintaining 60 mph. On the curves (gentle 55mph curves), the bike was resistant to turn but managed just fine. This told me there was an issue but I was only a couple miles from home. After a couple more curves I was sure a tire was going down, so I wanted to get it home. Getting home I found there was 0 air in the tire and I had been running on a flat. The sidewall did not give at all so there was no loss of control and I even was able to put it on the sidestand and then up on the center stand. This was a huge surprise because on previous bikes if I had a quick flat it was a matter of getting control and not crashing before getting stopped. This instance was like running on a run flat. I have always been a Metzler user and am now more than ever. I assume this is the reason for the extra reinfored ME880 BMW recommends on this bike. I will never complain of the cost again.