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Old 10-09-2013, 09:40 PM   #1
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TPMS Valve Stem placement

I'm having new tires put on tomorrow and will be getting my new TST sensors next week. Is there a preferred direction for the stems, straight out...to the side along the wall of the rim...or does it matter as long as you can adjust the air.

I looked for some pics of others who have them installed without much luck.


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Old 10-09-2013, 09:56 PM   #2
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My rear outside valves suck to check the air will have to install these
180 Degree Valve Extenders (2 per package) — always shiny wheels and rv
but the inside are fine. Can't see why they can't have the outside turned 180degs to make it EZ.
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Old 10-09-2013, 10:29 PM   #3
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On my outside, I ran the braided hose through a hole and back to the center hub and mounted it like the inside hose extension. My front tires just have a metal extension with a short 45 degree to get the sensors away from the wheel slightly.
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Old 10-09-2013, 10:56 PM   #4
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The industry standard is to have the inside stems face out and the outside stems face in. That's so the wheel/tire assembly can be mounted either way. But most RV's never rotate their tires. I have the 180 extensions on my outside wheels but really should have the stems turned around. Maybe someday.....
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Old 10-10-2013, 06:03 PM   #5
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Thanks for the input fellas, new tires on with stems in a position to screw on the sensors when I pick them up.
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Old 10-10-2013, 09:12 PM   #6
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I installed the TST system this summer and had same concern. Called local truck shop (Cummins dealer) and asked about rotating outside valve stems. No problem, provided you let the air out of the tire first. This to not blow out the O-ring on the stem. I dropped pressures to 30 ish, loosened nut and turned stems 90 degrees. Installed TPMS sensor and inflated tire. Works great. Took a 3,000 mile trip with no issues. Try it, you'll like it!

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