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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Wheels and Tires > Tpms sensor useless for 20"?
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      11-15-2014, 01:56 PM   #1
Nowe
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Tpms sensor useless for 20"?

Hi

I just had a flat tire on the OEM 20" on the original PZero RFT's...

The car had to be towed to the dealer. Funny thing is the car never warned me the air pressure was low in my tire, in fact I stopped because it was making a funny noise.

The dealer told me it's normal because the tire is so thin the TPMS can't detect the change of pressure in the tire...

What do you guys think about what they told me?

Anyways it's a good thing I have to switch tires, I guess I'm gonna put non-RFT from now on
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      11-15-2014, 03:31 PM   #2
Orion4
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That sounds like BS. Pressure change is pressure change no matter the tire size. The pressure might drop more quickly on a 20 since there may be less volume, but a working sensor should still detect the drop. More likely a bad sensor or system.
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      11-15-2014, 04:01 PM   #3
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Quote:
Originally Posted by Orion4 View Post
That sounds like BS. Pressure change is pressure change no matter the tire size. The pressure might drop more quickly on a 20 since there may be less volume, but a working sensor should still detect the drop. More likely a bad sensor or system.
Its definitely BS. BMW sells 20's for these cars. Theres no way they would do that if the sensors wouldn't work with them.
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