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Mine are the metal type (High-Pressure Metal Clamp-In Valves) but I think my truck came with the metal stems because it came with the factory gray steel wheels. (commercial vehicle)
My tire shop automatically changed mine out to the metal ones when I got my new tires... Im guessin they already knew that the rubber ones wouldn't work when I switched from the P tire to the LT tire on my 150...
I use the TR412 rubber short stem. I haven't had any issues withthem. But I dot run more than 65 psi. I like how short they are, so they don't get ripped off so easy.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
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