Had a flat this past week along the interstate. Luckily was not hurt and did not crash. I was traveling a little too fast, thats usually when a problem develops and it had to be a rear Metzeler, of course the newer one. However, when evaluating the tire, I could not determine if the noticeable hole in meaty part of tread was the culprit. Nail was out and noticed no bubble with the standard spit test. Thought it might be the stem because that seemed a little loose. My CO2 cartridges did not help and the can of gel-foam nozzle cracked while moving around in the saddle bag this past year.. The bike was flat bedded to a local dealer. A new tire put on because they would not plug it (policy they said though smack center of tread). While they installed, I asked about a valve stem stabilizer. They said that was something they had for all rice burners except the BMW's. Automatic for Goldwings (Honda dealer) and could be ordered for the LT for a small charge. Amazing,, Does anyone know if these things are helpful and why isnt that a standard item for installed tires? It is designed to resist wind from moving the valve stem around at higher speeds.