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Different size valve stems?

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Old Jul 21, 2025 | 01:34 PM
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Different size valve stems?

I bought some valve stems with sensors for the Ford trailer TPMS and took trailer and stems to Discount Tire to get them installed. They couldn't do it though because the wheels have larger holes than the standard? They said standard was like dime sized while the wheels (new trailer) were like quarter sized? Anyone heard of this? Is there maybe some adapter that can be used here?
 
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Old Jul 21, 2025 | 01:39 PM
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Never seen any wheels with valve stem holes the size of a quarter!
Now, there are some different size valve stems in some heavy duty wheels, but not that big.
Those wheels came with the trailer?
Might want to inquire with the trailer manufacturer.
 
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Old Jul 21, 2025 | 01:44 PM
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Originally Posted by Ltngdrvr
Never seen any wheels with valve stem holes the size of a quarter!
Now, there are some different size valve stems in some heavy duty wheels, but not that big.
Those wheels came with the trailer?
Might want to inquire with the trailer manufacturer.
I think maybe more lime and nickel but I didn't see them. I have an email into the trailer manufacturer.
 
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Old Jul 21, 2025 | 02:06 PM
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Changed my trailer valve stems over to metal stems and noticed similar.
Amzn kit Amzn kit
had adapters for 0.453" and 0.625" Rim Hole

 
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Old Jul 21, 2025 | 02:36 PM
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Originally Posted by nychan
Changed my trailer valve stems over to metal stems and noticed similar. Amzn kit had adapters for 0.453" and 0.625" Rim Hole
Those are the whole stem. I just need a collar so I can install the TPMS stems I already have.
 
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Old Jul 21, 2025 | 02:45 PM
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Originally Posted by Squanto
Those are the whole stem. I just need a collar so I can install the TPMS stems I already have.
Gotcha, I was showing an example of the different sizes. Do you have info on what wheel (OD) and TPMS sensor (ID)?

Something like
this this
should work but need to confirm OD and ID.
 
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Old Jul 21, 2025 | 02:55 PM
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Originally Posted by Squanto
Those are the whole stem. I just need a collar so I can install the TPMS stems I already have.
They won't make anything like that, new correct stems or nothing I'm afraid.
 
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Old Jul 22, 2025 | 06:36 AM
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Originally Posted by nychan
Gotcha, I was showing an example of the different sizes. Do you have info on what wheel (OD) and TPMS sensor (ID)?

Something like this should work but need to confirm OD and ID.
Those bushings are for tube type ONLY fitment and not tubeless as they won't seal airtight around the valve stem. Tube stems naturally bleed off the trapped air between the tube and tire through the stem opening in the wheel. I know as I patched enough tubes at Ft. Knox to last a lifetime during Operation Iraqi Freedom.
 
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Old Jul 22, 2025 | 06:52 AM
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Ok, so it seems .625 holes are typical for 8 lug trailer wheels. No idea why as it's the same Schrader valve so it's not like you can get more air in them faster. I'm not having any luck finding .625 sensors other than the dust cap kind.
 
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Old Jul 22, 2025 | 08:08 AM
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I think you'll need new stems designed for the larger hole.

https://www.alltiresupply.com/produc...41639931936842
 
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Old Jul 22, 2025 | 09:56 AM
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Thanks! I actually found and ordered those mere moments before getting the notice of your reply.

Looks like Dill Air Supply is the only manufacturer of a metal 5/8 valve stem with a TPMS sensor screw. Bought through their site which handed me off to the Northern Tool site and got a military discount.
 
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