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Old 07-19-2016, 06:26 AM   #1
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TPMS senders and rubber valve stems

If you are installing a TPMS on your camper it is recommended you use metal valve stems. When you install the senders on a rubber valve stem the centrifugal force WILL bend that stem to the point the sender will actually touch the rim. However you are probably not really wanting to de-mount your tires just to replace them with metal valve stems.

There is a way around this. Take a piece of galvanized wire and make a retainer to hold the rubber valve stem from bending.

When tire replacement is actually required I will put in metal valve stems at that time.
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Old 07-19-2016, 12:00 PM   #2
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Originally Posted by tnchuck100 View Post
If you are installing a TPMS on your camper it is recommended you use metal valve stems. When you install the senders on a rubber valve stem the centrifugal force WILL bend that stem to the point the sender will actually touch the rim. However you are probably not really wanting to de-mount your tires just to replace them with metal valve stems.

There is a way around this. Take a piece of galvanized wire and make a retainer to hold the rubber valve stem from bending.

When tire replacement is actually required I will put in metal valve stems at that time.
Interesting idea! Thanks for sharing.

Roger
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Old 07-19-2016, 12:23 PM   #3
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Seems to me that the small diameter wire would cut/wear into the rubber valve stem over time as the C-force pushes it outward.
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Old 07-19-2016, 01:54 PM   #4
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Seems to me that the small diameter wire would cut/wear into the rubber valve stem over time as the C-force pushes it outward.
This wire actually touches just above the rubber part. This has been in place 2 1/2 years so far. No problems.
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Old 07-19-2016, 06:48 PM   #5
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This wire actually touches just above the rubber part. This has been in place 2 1/2 years so far. No problems.
Nice. Is that a steel fishing leader you're using?
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Old 07-19-2016, 06:52 PM   #6
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Nice. Is that a steel fishing leader you're using?
No. It's just galvanized wire that won't rust. Fishing leader is too springy and will not stay where you put it.
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Old 07-19-2016, 08:14 PM   #7
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Nice! We used the TPMS senders on the rubber stems and can see where the senders contacted the rim. Never had a problem, but would have preferred metal stems. With that being said, great idea to help the rubber stems have a bit more rigidity.
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Old 07-19-2016, 08:18 PM   #8
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Quote:
Originally Posted by tnchuck100 View Post
If you are installing a TPMS on your camper it is recommended you use metal valve stems. When you install the senders on a rubber valve stem the centrifugal force WILL bend that stem to the point the sender will actually touch the rim. However you are probably not really wanting to de-mount your tires just to replace them with metal valve stems.

There is a way around this. Take a piece of galvanized wire and make a retainer to hold the rubber valve stem from bending.

When tire replacement is actually required I will put in metal valve stems at that time.

In the picture it looks like there is some kind of clip on the wire where it connects to itself. Is there some sort of clip there? Or is it just the way you knotted the wire to itself?
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Old 07-20-2016, 05:18 AM   #9
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In the picture it looks like there is some kind of clip on the wire where it connects to itself. Is there some sort of clip there? Or is it just the way you knotted the wire to itself?
No clip. Just folded back. Simple.
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Old 07-20-2016, 06:08 AM   #10
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Great fix.
When we first put our TST system on it worked fine for 3-4 trips. Then we started getting loss of air while traveling on a few tires. After it happened twice, I had short metal stems installed on all tires. No more problems after 3 years.

I am confident that eventually I would have had one crack from flexing but it did not happen to us.

TST said the fix was metal stems.
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