Not sure all tires come with this - Didn't see it on the last set I purchased so don't know about placement with the valve stem. The one wheel that required extra weight (you didn't say how much total weight) might have an issue with the tire having a heavy or light spot that requires the extra weight. Swapping out that wheel and putting that same tire on and then balancing it again will determine if it is that specific wheel causing the issue. Good luck.