Originally Posted by Teamfour
I agree that metal valve stems are optimal. BUT, I bought chrome valve stem covers. They slip over the rubber stem and the lower part of the sleeve fits snug in the pocket in the wheel at the base of the stem. This prevents the rubber stem from flexing. Over 7k miles on my setup without any issues or signs of flex.
Sounds like that is working for you, I know that when I had them on mine the blow through which were just slightly heavier then the screw on type, that the locking screw showed marks on my rim where the screw was hitting so I knew they where flexing to much, So when I bought the new tires which came with rubber stems 1/4" I had them put in after, that is how I found out about the flexing of the stem. If I remember right, they charged me 9.00 per tire to install the metal stems. The system may not be perfect as other threads have said but, I'm so glad my friend OC said to buy it. Makes me feel safer knowing whats going on back there, blowouts scare me, after my first blow out and seen that tire I can see why it causes so much damage. I was lucky I seen it blow and was able to stop in time to stop any damage....