If your metal valve stems are fully threaded, could you make a bracket that attaches in some manner to the threaded stem and then the wheels cover. Or even secure a small bracket around the stem itself to help protect it?
The replies on drilling the hole, maybe tapping it (I don't own a tap set, but I know where to find indivdual taps in the hardware store), sounded good until I hit "ASA Glamis" answer - that really has me scared now. That part of the wheel is approx 1/4" thick so I thought a small hole would not hurt, maybe his E-350 wheels were not as thick? But I don't think I need a broken wheel while running 60 mph down the road... I can just picture broken bits flying everywhere...
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I believe that he speculated that forcing a sheet metal screw into the hole helped start the crack????
if a tiny hole, threaded with a bolt in it would cause the entire wheel to crack in two, I wouldn't have any confidence in those wheels holding up, hole or no hole.
bumpy
Chuck the Tire Man told me about a method to stop wheel covers from rotating.
I believe he said Lazy Daze adds a 1" long threaded nut to one of the wheel bolts. The original wheel nut is left in place. The extended nut is added. That extended nut fits inside the fake nut on the wheel simulator. The wheel simulator will then only rotate until it hits the nut extension.