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Old 12-05-2015, 04:58 PM   #1
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Metal Valve Stems required for TPMS?

While waiting for delivery of our new Classic, I have invested in a TST TPMS. I see some forum posters have recommended metal valve stems, but see no reference to this in the product install guide. Are the metal stems a necessity, or just good practice?
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Old 12-05-2015, 05:03 PM   #2
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Necessity if you have stem mounted sensors. The flexing causes stem failure. I had 3 failures with rubber stems before switching.
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Old 12-05-2015, 05:10 PM   #3
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We did not have a failure but the flopping of the rubber stem with the TPMS sensor on top was obvious from the black marks on the wheel on each side of the stems. We installed metal stems.
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Old 12-05-2015, 05:26 PM   #4
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Yes

Possible stem failure and marking of the wheel as the sensors hit them.
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Old 12-05-2015, 08:06 PM   #5
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From the TST FAQ:

FAQ -

"Do I need special valve stems?
No, you do not need special valve stems, but you do need commonly available metal valve stems.

The added weight of the sensor on a rubber valve stem could cause problems that will be avoided by using metal valve stems.

Most motorhomes and commercial transport vehicles come equipped with metal valve stems. If you do need metal valve stems, they are not expensive; a recent customer had 6 valve stems replaced on a 30’ gooseneck racing trailer for $36. They are available and can be quickly installed by any tire dealer."

So, yes.
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Old 12-05-2015, 09:01 PM   #6
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Metal Valve Stems

I have the TST tire pressure monitoring system. I bought my Einky steel valve stems from the dealer below. Very good to work with.
https://www.shinyrv.com/store/c1/Featured_Products.html
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Old 12-06-2015, 09:45 AM   #7
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Must do it.. the extra weight of the sensor will cause the movement of the stem in the hole and will cut thru and cause leakage..
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Old 12-06-2015, 11:43 AM   #8
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I have the Pressure Pro system on my truck and 25' Safari and they recommend metal valve stems. I used standard valve stems for 8 years with no problems but have switched to metal valve stems when I recently replace all my tires. If I was starting out again, I would install metal valve stems from the start.
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Old 12-06-2015, 12:58 PM   #9
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Even without the TST the choice should always be to use metal stems as UV degrades rubber and heightens the probability of failure. The ensuing damage from a deflated tire so greatly exceeds the cost it boggles the mind to do otherwise. I hope the poster who survived 8 years with rubber stems replaced his tires and stems during that timeframe.
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Old 12-06-2015, 01:21 PM   #10
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Quote:
Originally Posted by Llando88 View Post
From the TST FAQ...
Wanted to add: I have a brand new TPMS (non flow sensors) from TST. Our trailer is a 2016 27' FC FB with OEM GYM 15" tires (hence TPMS lol.)

We are going on our shakedown trip on Tuesday, with the TPMS installed.

I know I need metal valve stems.

Question: how urgent, in terms of 'when', do I need to swap to the metal stems on my GYM tires?

Before the trip?

In the next month or two?

When I replace the GYM with Michelins in a couple years?

Thanks for any advice on this...Rich
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Old 12-06-2015, 01:48 PM   #11
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Do new AS 2015 come with metal valve stems?
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Old 12-06-2015, 01:54 PM   #12
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I have metal stems on my F150. Flat tires suck. After the hassle of having to replace a few stems, (even though a free service because of my tire warranty), worth the extra money. If there was any question on it, I'd err on the side of caution.
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Old 12-06-2015, 04:26 PM   #13
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I have run TMG 400 "Tire Minder" TPMS on "E" Rated Maxxis ST tires on our 2012 30 FC since 2013. They are mounted on Rubber stems and I run the unit hard many times on US 10 here in TX at 70 mph and back roads at 65--Never had a problem. Here is what Tire Minder says in their manual:

""As the TireMinder® transmitter only weighs 0.3 oz, it will not affect tire balance. As well, due to their light weight, they may be used on wheels equipped with rubber valve stems.""

All that said, when I replace the Maxxis in another year (will replace every 3 to 4 years) I am going to have metal installed. Good insurance even if company says not needed.

For stem mounted TPMS I don't think you can beat Tire Minder--cust service is outstanding, etc.
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Old 12-06-2015, 04:37 PM   #14
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Quote:
Originally Posted by PSU1981 View Post
Do new AS 2015 come with metal valve stems?
Uh, not sure about 2015, but my 2016 FC FB 27' came with standard rubber valve stems.
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