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Old 11-03-2009, 03:21 PM   #1
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Default How to Determine Valve Stem Size?

I recently purchased a set of 08 Legacy 17x7's. They are sans valve stems. Before I go out and purchase the wrong size stems, is there a way to determine what size I need? Any recommendations for material? They will just be my winter shoes, so I dont need anything flashy.
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Old 11-03-2009, 04:14 PM   #2
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Just have the shop put on rubber valve stems when they mount the tires.
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Old 11-03-2009, 08:01 PM   #3
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I am aware that is an option, but just like my oil changes (and performance mods) I like doing the work myself as much as possible. Can anyone point me in the correct direction to obtaining the info?
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Old 11-03-2009, 10:18 PM   #4
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You're gonna mount your own tires?

Do you mean you're looking for steel/ metal valvestems or are silicone/ rubber ok?
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Old 11-04-2009, 09:29 AM   #5
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I do not plan on mounting them myself, not sufficient tooling. I know it is a low cost job for them to install valve stems, but still has room for me to save money. In addition, I know that the parts I put on are of known quality. Since the tires are not mounted yet, it should be quite simple.
I would be fine with silicone stems, but durable clean looking (no fake chrome, silly lights, etc) metal ones would be nice. How about an option from both categories? Or, help me figure out the size I need and I can narrow down my choices.
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Old 11-04-2009, 10:21 AM   #6
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It's unlikely that they will charge you anything to install valve stems.

As for sizing, you can probably shove the shank of a drill bit through the hole. Just match the drill size to the hole size. You could also use, you know, a ruler.

I haven't got a clue if they're metric or standard. Consult common valve stem sizes for that. :P
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Old 11-04-2009, 05:15 PM   #7
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measure the hole where the valve stem goes, and buy them yourself if you want. Normally they dont charge for install of valve stems, just for the price of valves... Metal are nice, but cost more.
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Old 11-05-2009, 02:24 AM   #8
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There are only two sizes for valve stems. The ones you find on every modern car, and some "fat" ones you'd find from some old ford truck. Installing a normal valve stem requires a valve stem puller. Basicly a tool that threads onto the stem so you can pull it and fully seat the rubber to prevent any leaks. And to be honest, unless you have a metal stem whoever mounts the tires will put a new stem in.
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Old 12-31-2015, 09:48 PM   #9
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So no one answered the freaking question, so I can't find the sneer searching. Just a bunch of non answers like "duh", why don't you have the tire shop do it?

If you don't know the answer ****. Some of us do our own work and want to know the answer.
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Old 12-31-2015, 09:58 PM   #10
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Oh. BTW.


Rubber snap-in valves are available to fit either .453" or .625" diameter holes in the rim and have effective lengths ranging from 7/8" to 2-1/2".

So it's an easy answer. No opinions required.
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Old 12-31-2015, 10:17 PM   #11
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Quote:
Originally Posted by Gscott View Post
So no one answered the freaking question, so I can't find the sneer searching. Just a bunch of non answers like "duh", why don't you have the tire shop do it?



If you don't know the answer ****. Some of us do our own work and want to know the answer.

Pretty much par for the course on NASIOC. 90% haters and trolls.
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Old 12-31-2015, 11:36 PM   #12
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And pretty much par for the course on every car truck and mc forum. I guess padding ones post count is more important than answering questions.

I'll measure the holes in my wheels and figure it out myself. And I won't promise to come back with the answer like everyone else does but doesn't.

Happy New year.
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Old 12-31-2015, 11:45 PM   #13
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Good to be answered for sure so others can find it if the search and find this posting. It is quite an old posting though.
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Old 01-02-2016, 08:47 AM   #14
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Okay. I'll get right on it and report right back.
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Old 01-02-2016, 04:40 PM   #15
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Oh, well I was taking your post #10 as the answer to the question. .453 being the answer for basically any wheel on a Subaru and the larger .625 for tractor and trailer wheels.

Last edited by Blingstrom; 01-02-2016 at 05:11 PM.
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Old 01-04-2016, 09:32 AM   #16
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Quote:
Originally Posted by Gscott View Post
So no one answered the freaking question, so I can't find the sneer searching. Just a bunch of non answers like "duh", why don't you have the tire shop do it?



If you don't know the answer ****. Some of us do our own work and want to know the answer.

No one answered the question because it's a stupid question.

Passenger car wheels all use the same sized valve stems.
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Old 01-04-2016, 10:41 AM   #17
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Quote:
Originally Posted by sc00by4life View Post
No one answered the question because it's a stupid question.

Passenger car wheels all use the same sized valve stems.
This right here...

You have 2 choices, and the possibility of it being 1 of the choices is basically impossible unless you're running tractor wheels on your wrx.

And every shop in the world won't charge to have stems installed if you're having tires installed at the same time. If you don't want the shop's stems, go to your local auto shop, take your old stems, make sure they're the same size and voila...you have new stems. They're more than likely the same stems they would've given you at the tire shop anyways.

In all the time I've spent on forums, I've never heard of a stem catastrophically failing due to improper installation by a shop. Hell, 99% of all wheels out there use the same stems and you don't hear about them being a fail point at all for wheels.

It seems you're getting way too worked up over something you should just have the shop do when they're putting the tires onto your rims.
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Old 01-10-2016, 11:09 AM   #18
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Quote:
Originally Posted by sc00by4life View Post
No one answered the question because it's a stupid question.

Passenger car wheels all use the same sized valve stems.

Ah, I see. So if you decide in all your eminent greatness the question is stupid you won't answer it! Aren't you awesome!

I searched all over the internet. I suspected all passenger cars use the small valve stem. But that question is not answered. I was trying to buy them at an auto parts store and didn't want to get the wrong ones. For such a stupid questions you'd think someone would have answered it. No one I have talked to knew there were two sized of valve stems, nor the difference, including 2 different auto parts stores.

I'm sorry I didn't meet you sooner, you are so super awesome and smart!

Yes, the hole in the rim of a '99 Forester steel 15" rim is less than 1/2". Small Valve stem.
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Old 01-10-2016, 11:14 AM   #19
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Quote:
Originally Posted by SubiDoogie View Post
This right here...

You have 2 choices, and the possibility of it being 1 of the choices is basically impossible unless you're running tractor wheels on your wrx.

<blah blah blah>

It seems you're getting way too worked up over something you should just have the shop do when they're putting the tires onto your rims.

Did you ever stop to consider I might be doing my own work? I am mounting my own tires. I dismounted them myself, painted the rims, mounted the tires myself, at my leisure. I can do it in less time that going to the tire shop and save money too. (mount and balance is about $100 plus tax these days) Using .25g airsoft pellets for internal balancing, so you can hammer me about that too I guess.
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