Am thinking..... Why wheel manufactures don't hide the valve stem in the wheel cap or on the inside to make clean looking wheels ? Why couldn't a wheel spoke be rifle drilled to mount the stem under the hub cap or center cap, or at least near the center of the wheel?

I know there are low profile stems that pop out to air up the tyre. ...but what about a rim totally devoid of a stem? Any valid reason why not ? ...especially on rims costing thousands each https://speedtest.vet/. Are we so conditioned to seeing a stem in plain sight?

I though I saw a rim with no stem once...don't remember where now.... but it was hidden under a pop up built into the rim but was invisible at first glance.

why not fill tire's with expanding foam, no blow out ever?

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Yes you can buy these .I have a set and i had forgot all about them till i saw your post I purchased mine to fit a set of new alloy wheels ,,,luck had it that the wheels would not fit, so i sent the wheels back ,...And i ended up with them ,..you can get them by searching on Ebay

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