Ive got cheapo black steel wheels on my TJ, the D-window ones, not sure of the brand. On all five of them, at different times, the valve stem has started leaking. When i go to add air, if you move the valve stem side to side at all, it leaks. One was so bad that when the shop removed it, it was almost ripped completely in half right at the part that sits inside the rim. I have no idea what would cause this, but i'm tired of taking tires off to get this fixed. The only possible cause i can think of is that i've had a set of those stupid chrome metal looking valve stem caps on, and the added weight on the end of the valve stem combined with the centrifugal force from the rolling wheel makes the valve stem rub on the rim. Anyone have any ideas or similar experiences?
Edit: These wheels/stem caps