TPMS and Rubber Valve Stems

eheading wrote:
The manual for my Tire Minder says that because the transmitters are so light, they will work fine on rubber valve stems.

Ed Headington

and they can say that because they know how long someones valve stems are ??
horse hockey !

I had about 75k miles with the original rubber stems with our TST units on our toad . I just had new tires put on and had them put on metal stems... just figured it would be more stable and not a big deal since they were working on the tires .

The manual for my Tire Minder says that because the transmitters are so light, they will work fine on rubber valve stems.

Ed Headington

I'm at about 15K miles on the toad with rubber stems and TST 510 sensors with no problems. The rotation of the tires and the weight of the sensors will cause the stems to deflect out some. Given enough time and the stem could fail. Next time the tires get replaced I do plan on having metal stems installed.

rgatijnet1 wrote:
I'm not sure about stacking another TPMS on top of the valve stem that already has a built in TPMS. Not sure how or if that works. As mentioned, some of the new factory TPMS systems are on rubber valve stems.

it works completely fine !

the OEM (in tire) sensors report to the vehicle system & the threaded on sensors (TST 507) report to the coach monitor - neither system interferes w/ the other.

I have BOTH on my Toad & everything works just fine.

DUPLICATE

I use the TST 507 system w/ the thread on (user replaceable battery) stems.
I run the sensors on our coach, which has metal valve stems...no problems.

I run sensors on our TOAD (pictured) which has rubber valve stems - and I've never had a problem there either - i show NO signs of rubbing or flexing (which the travel trailer / trailer guys have apparently seen).

from what i can tell - those that are seeing valve stems failures may be seeing failures because of the longer more flexible stems - some have reportedly installed some rubber gas line tubing over the OEM valve stems to provide some added strenth preventing flexing of the stem.

Ive got at over 30k w/ the sensors on the toad (rubber) valve stems & no problems, no failures no leaks.

I replace the batteries when theyre dead (about every 18 months) - and obtain the batteries for about 32 cents each (3.22 for 10 batteries, including shipping)

I've used the 507 system for over 80,000 miles with no issues. Installed over federally mandated internal sensors with rubber stems....YMMV....Dennis

An external TPMS such as the 507 TST will cause a rubber valve stem failure in time.

On my truck this happened after about 10,000 miles after new tires and Chinese rubber covered high pressure metal core valve stems. I had two valve stems fail in about 50 miles. I was lucky in the first happened close to home and I was able to get home on the spare. The next morning I found another flat tire due to a valve stem failure.

If you like to play Russian roulette you may be lucky with no failure but could also have a double failure a long way from a tire shop.

I had the opposite experience from previous responses - I installed a TPMS on trailer tires, on the return side of a 1200 mile trip I dad a flat causes by a crack in the rubber valve stem. Replacing with metal solved the issue.