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Old 07-30-2021, 12:45 AM   #1
a5m
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Join Date: Nov 2020
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Satin White Pearl

Default TPMS Won’t Fit New Wheels

In the beginning stages of researching this subject so would appreciate some help or guidance in the meantime:

So I got new-to-me wheels installed today on my 2010 WRX and the shop couldn’t get the valve stems and TPMS sensors swapped over because the valve stem hole diameter is too small compared to the stock wheels.

I’m moving too so limited on time but it seems I need some type of adapter? The shop mentioned some Schrader TPMS Sensors that might work, but not 100% sure they’d work plus they’re expensive.

Thanks in advance.
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Old 07-30-2021, 08:01 PM   #2
trust_power
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I use Schrader TPMS sensors on my WORK wheels and they work well.
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Old 07-30-2021, 10:20 PM   #3
a5m
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Quote:
Originally Posted by trust_power View Post
I use Schrader TPMS sensors on my WORK wheels and they work well.
Thanks for your reply.

You don’t happen to remember which ones exactly?
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Old 07-31-2021, 01:34 PM   #4
Elbert Bass
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Shop probably didn't have the proper replacement stems, or wanted to sell you new sensors.

There is a standard size stem hole in automotive wheels - one size. (at least that I have seen in the US). Subaru uses a regular rubber stem fitted with a brass post that the TPMS sensor screws to. It is next to impossible to remove the rubber stem without tearing it. In the 9 years I worked at Subaru we almost ALWAYS sold new stems when installing tires on new set of wheels then swapped just the sensors.
First photo is the replacement stem.
Second is stem and sensor as installed in the wheel that would have come with a 2010 WRX.
Third is the bolt in sensor used in 2005 - 2008 Legacy, Outback, & Tribeca ONLY. That stem/sensor still fits standard size hole.





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Old 07-31-2021, 04:18 PM   #5
a5m
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Satin White Pearl

Default

Quote:
Originally Posted by Elbert Bass View Post
Shop probably didn't have the proper replacement stems, or wanted to sell you new sensors.

There is a standard size stem hole in automotive wheels - one size. (at least that I have seen in the US). Subaru uses a regular rubber stem fitted with a brass post that the TPMS sensor screws to. It is next to impossible to remove the rubber stem without tearing it. In the 9 years I worked at Subaru we almost ALWAYS sold new stems when installing tires on new set of wheels then swapped just the sensors.
First photo is the replacement stem.
Second is stem and sensor as installed in the wheel that would have come with a 2010 WRX.
Third is the bolt in sensor used in 2005 - 2008 Legacy, Outback, & Tribeca ONLY. That stem/sensor still fits standard size hole.





Thanks for taking the time to reply in detail with pictures to explain. Visual learner so that helps immensely.

The ‘new’ wheels are from Japan so that may be why the valve stem hole is a different size. They showed it to me. The hole is physically smaller than those on my stock rims.

I see Schrader makes some sensors that look like they might work. Some companies also sell an adapter but not sure if it’s for the purpose of fitting in smaller valve stem holes or something else, like the angle or position of the hole itself, prohibiting the TPMS sensor from attaching to the stem.
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Old 08-02-2021, 01:41 AM   #6
2dino
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Seems there are at least two standard hole sizes:
.453" or .625"

https://m.tirerack.com/tires/tiretech/techpage.jsp?techid=208
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Old 08-11-2021, 09:19 PM   #7
a5m
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Quote:
Originally Posted by 2dino View Post
Seems there are at least two standard hole sizes:
.453" or .625"

https://m.tirerack.com/tires/tiretech/techpage.jsp?techid=208
Just saw this as I’m not getting any email notifications for some reason.

Thank you so much for the link! I put this on the back burner but will look into it and hopefully find something that works.
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