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Old 06-30-2010, 08:39 AM   #1
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Questions about TPMS and valve stems/adapters.

With all the problems after market wheels are having and the proposed solutions to keep the inside stems from rubbing the brake line and control arms, I'm still not sure I understand everything.

Here's my questions:

1. Why do the aftermarket wheels have the second inside stem anyway? Can't the TPMS be attached to the outside stem?

2. Many of the adapters don't work on the inside lip of the wheel. Why can't the adapter be installed on the outside hole and used there? Then put a short rubber stem on the inside?

Thanks,
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Old 06-30-2010, 10:12 AM   #2
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1. Most wheel manufactures tend to place the valvestem hole where it is less likely to affect the appearance of the wheel. Some wheels have the valvestem protrude through the face of the wheel, taking the place of a rivet. Most wheels have the valvestem hole behind the face somewhere, usually on the drop-center of the wheel (the hump). TPMS sensors attach in various ways, they cannot always fit properly on that valvestem hole location. This is why adapters are required.

2. The TPMS sensor must lay flat, whether that is within the drop-center or on the hoop surface. This way, if you have a flat tire it won't get damaged. The sensor body itself must always remain below the outer edge of the wheel, never sticking out past the outer edge of the wheel diameter. Various pics attached.

The main reason is that there are only a handful of actual hoop makers that supply all of the wheel companies. These hoops are not built with TPMS fitment in mind, as thousands of cars do not have TPMS sensors. Therefore, the need for adapters exists. Also, TPMS sensors come in a variety of sizes, angles, mounting methods, so wheel makers cannot plan for each of them. Most of the time, the second hole is just for an adapter, the other one used for air. Whenever possible, yes it is best to try and get the valvestem hole provided to work, but that just isn't always the case. Every brand of wheel has their own hole locations, it is not a standardized industry. You are more likely get at TPMS to fit like OEM if you go with a stepped lip or cast aluminum wheel, as these tend to have the drop-center (hump) towards the front of the wheel much like an OEM wheel does.

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Old 06-30-2010, 12:27 PM   #3
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Tony, what kind of TPMS mounting does the Pro Wheels "Boost" utilize ?? Does the Boost end up having a 2nd valve stem pointing out the back of the wheel ??
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Old 06-30-2010, 01:48 PM   #4
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Quote:
Originally Posted by Nine Ball View Post
1. Most wheel manufactures tend to place the valvestem hole where it is less likely to affect the appearance of the wheel. Some wheels have the valvestem protrude through the face of the wheel, taking the place of a rivet. Most wheels have the valvestem hole behind the face somewhere, usually on the drop-center of the wheel (the hump). TPMS sensors attach in various ways, they cannot always fit properly on that valvestem hole location. This is why adapters are required.

2. The TPMS sensor must lay flat, whether that is within the drop-center or on the hoop surface. This way, if you have a flat tire it won't get damaged. The sensor body itself must always remain below the outer edge of the wheel, never sticking out past the outer edge of the wheel diameter. Various pics attached.

The main reason is that there are only a handful of actual hoop makers that supply all of the wheel companies. These hoops are not built with TPMS fitment in mind, as thousands of cars do not have TPMS sensors. Therefore, the need for adapters exists. Also, TPMS sensors come in a variety of sizes, angles, mounting methods, so wheel makers cannot plan for each of them. Most of the time, the second hole is just for an adapter, the other one used for air. Whenever possible, yes it is best to try and get the valvestem hole provided to work, but that just isn't always the case. Every brand of wheel has their own hole locations, it is not a standardized industry. You are more likely get at TPMS to fit like OEM if you go with a stepped lip or cast aluminum wheel, as these tend to have the drop-center (hump) towards the front of the wheel much like an OEM wheel does.

Tony


Nice.....thanks for posting these pics. I'm new with all the TPMS stuff and it's nice to actually see what they look like and how they fit on the wheel.
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Old 06-30-2010, 02:00 PM   #5
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Quote:
Originally Posted by flht99b View Post
Tony, what kind of TPMS mounting does the Pro Wheels "Boost" utilize ?? Does the Boost end up having a 2nd valve stem pointing out the back of the wheel ??
Pro Wheels typically have one hole, located behind the face on the drop-center, but aimed towards the front of the wheel. We've used aftermarket sensors directly in that hole no problem. Brands vary on hole locations, but it doesn't really matter as long as you have the proper adapters that work. The goal is to get the sensors inside the tire, and not have them stick out past the wheel diameter. Too bad the OEM sensors have such long stems, they were probably intended for SUV's.
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Old 06-30-2010, 02:25 PM   #6
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Thanks. I'm going to try and use adapters/TPMS on the outside hole, and use short rubber stems, or mount them upside down, on the inside hole.
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Old 06-30-2010, 02:47 PM   #7
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Berean, if you want to play safe, mount the sensors however it works, then bolt the wheel onto the car - before mounting the tire. Make sure it rotates freely without hitting anything. Also be sure the jack is under the suspension, so that the suspension is in the normal position and not hanging down. For front wheels, be sure to turn the steering wheel completely in both directions to check for clearance too.

If everything clears, you are good to go.
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Old 06-30-2010, 03:53 PM   #8
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Wouldn't it work just to put the stock stems/TPMS in the outside hole? You could get a chrome sleeve and cap. It would be kind of long but it might be better than an adapter.
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Old 06-30-2010, 05:18 PM   #9
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Every single wheel brand has different hole locations. You can't just make a blanket statement about putting a sensor in the outside hole. Not every wheel has two different holes. Sometimes you even have to drill your own hole (rare) for TPMS fitment. Just about every forged wheel has the hole on the inside of the wheel, not the outer face. Like I said, only stepped lip wheels have the outer hole on the face.

Yes, it is always preferred to try and make the TPMS sensor work without an adapter, but that is not always possible. Sometimes that valvestem collides with the brake caliper, or the suspension arms, or the brake lines. The smaller the diameter of the wheel is, the bigger the possibility of clearance issues. Larger wheels move the stem/sensor further away from the typical collision areas. Lowering a car can also increase potential of clearance issues, due to it changing the geometry/location of the suspension components relative to the wheel.

And then there are those pesky "Roller Skate" weighted brake pads on the later 2010 Camaro builds. Luckily those can be removed by simply changing out the brake pads to an aftermarket brand. Those roller skates are realllllly dumb.
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Old 06-30-2010, 05:30 PM   #10
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Examples.

Here is a "Stepped Lip" wheel. On these wheels, the drop-center area (the "hump" on the hoops) is toward the front of the wheel. Notice it has the valvestem much like an OEM wheel would be, on the outer lip.



On a smooth lip (aka "soft lip", or "reverse-drop") wheel, it provides a more modern appearance at the sacrifice of moving the drop-center to the rear side of the wheel. This allows the wheel maker to use a larger diameter center on the wheel, making a wheel visually larger looking. Most forged wheels are built similar to this. The valve stem is then located within the middle of the wheel. It just looks better like this.



And then you have some smooth lip wheels that pass a 90-degree elbow type valvestem through the face of the wheel. You definitely need TPMS adapters for this type of valvestem, show above on my first reply. The one with the 90-degree elbow.

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Old 06-30-2010, 05:49 PM   #11
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I have Foose Legends. The outer valve stem is right between the spokes on the flat chrome surface. The inner TPMS stem is at an angle on the back lip.

It seems like either the adapter or the direct TPMS valve stem solution would work with mine. I'll plug the back hole with a reverse stem.
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Old 06-30-2010, 05:50 PM   #12
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Those bottom wheels are SICK!
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Old 06-30-2010, 07:57 PM   #13
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A couple more different adapters. Quite a few of them out there.
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Old 07-01-2010, 04:14 PM   #14
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Tony, exactly what parts do I need to install factory TPMS sensors in the Pro Wheels Boost wheels ?? I bought the wheels and tires from Roger. I'm having the same issue most others are having with the aftermarket sensors. They learn fine using the owners manual tire pressure learn sequence but then drop out within about 20 miles giving the "service the tire monitoring system" error.
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Old 07-02-2010, 02:00 PM   #15
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Quote:
Originally Posted by flht99b View Post
Tony, exactly what parts do I need to install factory TPMS sensors in the Pro Wheels Boost wheels ?? I bought the wheels and tires from Roger. I'm having the same issue most others are having with the aftermarket sensors. They learn fine using the owners manual tire pressure learn sequence but then drop out within about 20 miles giving the "service the tire monitoring system" error.
Ed M.
Ed, we just mounted a set of Boze wheels that have the same valve hole location as your Pro Wheels, we used adapters like this:

http://www.iforged.com/store/product...products_id=10

Basically, you dismantle the stem from the OEM sensor, then reassemble the sensor with the adapter loop in the middle of the sensor/stem joint. Put the adapter valve through the wheel hole.
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Old 07-02-2010, 04:49 PM   #16
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Ed, we just mounted a set of Boze wheels that have the same valve hole location as your Pro Wheels, we used adapters like this:

http://www.iforged.com/store/product...products_id=10

Basically, you dismantle the stem from the OEM sensor, then reassemble the sensor with the adapter loop in the middle of the sensor/stem joint. Put the adapter valve through the wheel hole.

It's not a perfect fit for the Camaro TPMS. It will rattle.
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Old 09-18-2010, 07:27 AM   #17
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I have Foose Legends. The outer valve stem is right between the spokes on the flat chrome surface. The inner TPMS stem is at an angle on the back lip.

It seems like either the adapter or the direct TPMS valve stem solution would work with mine. I'll plug the back hole with a reverse stem.

I am getting the Foose legend wheels also, Do the OEM TPMS work? Or is there an aftermarket brand you reccomend that works with these wheels?

Thanks.
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Old 09-18-2010, 10:22 AM   #18
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I am getting the Foose legend wheels also, Do the OEM TPMS work? Or is there an aftermarket brand you reccomend that works with these wheels?

Thanks.
They work, but you will have to tie back your parking brake lines in the rear to keep the TPMS stems from hitting them.

Also, you can't lower the car with the TPMS stems.

No stem type adapters will work with these wheels either by the way. Banded adapters should work though.

What I ended up doing, so that I could lower my car, is have the TPMS unit, without the stem, taped directly to the wheel with the same double sided tape that they use for wheel weights, then plugged the TPMS hole with an upside down stem to keep it from rubbing.

It seems to be working just fine like that and I was able to lower my car.

If I had it to do over again, I would not have bought Foose wheels. They were poorly designed for the Camaro, and they are cheaper cast wheels anyway. They do look good though, and I do like them, it just wasn't worth the TPMS hassle.
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Old 09-18-2010, 01:54 PM   #19
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You double-sided taped the sensors inside the wheels? That won't work for long. The reason balancing weights work is because the centrifugal force pushes the weights outward into the wheel. Having the sensors on the outside of the wheel will force them away from the wheel. As wheels heat cycle, the glue on the tape will soften.

I've even used epoxy to glue sensors before, that didn't work either....after a few days of driving.
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Old 09-18-2010, 02:22 PM   #20
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I'm so Fing confused.


Ugh..............

I'm still F***ed not knowing what sensors to buy. I don't even know if the GM ones will work.
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Old 09-19-2010, 10:02 AM   #21
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GM sensors will work PQ. Your Savini's will just require adapters, just like Terri's did.
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Old 09-19-2010, 10:46 AM   #22
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PQ, If you need the I Forged adapters, let me know. I have a new set that wouldn't work on my Foose wheels. I paid $83 delivered from I Forged. You can have them for $50 delivered.

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Old 08-02-2011, 04:08 PM   #23
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tpms

I just put after market wheels on my 2011 Camero and paid for tpms ($70.00 a piece) that didnt have to be calibrated and they dont work. I was told to drive 20 miles and they would adjust I have driven over 100 miles and nothing any suggestions??
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Old 08-02-2011, 04:35 PM   #24
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Sensors do not reset or learn on their own. You have to activate the TPMS relearn feature on your car, then use a scanner tool to fire off the sensor in the proper sequence. Or, use the air deflation method found in your owner's manual.
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Old 08-02-2011, 09:50 PM   #25
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Wow, old thread. I absolutely hated dealing with this issue.

A year later, my TPMS sensors are still stuck tight with the tape. Although a year later for me is only 2500 miles.
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