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Aftermarket Wheels and TPMS

Discussion in 'New A3/S3 (8V Chassis)' started by JT-007, Feb 17, 2014.

  1. JT-007

    JT-007 Member

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    Think I already know the answer to this but how does TPMS handle aftermarket wheels?
     
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  3. cuke2u

    cuke2u Well-Known Member

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    Doesn't matter as long as you reset it...
     
  4. visionthing

    visionthing Active Member
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    Indirect TPMS do not use physical pressure sensors but measure air pressures by monitoring individual wheel rotational speeds and other signals available outside of the tire itself. First generation iTPMS systems utilize the effect that an under-inflated tire has a slightly smaller diameter (and hence higher tangential velocity) than a correctly inflated one. These differences are measurable through the wheel speed sensors of ABS/ESC systems.

    On that basis, once the TPMS has been reset the sensors should work off the current values of the new wheels, then any changes would trigger an activation.
     
  5. JT-007

    JT-007 Member

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    Cheers guys
     
  6. Liquidfusion-S3

    Liquidfusion-S3 I fall to peer pressure!

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    Does anyone know if the newer generation 8V uses indirect or direct TPMS?
    If I do pick up a new set of wheels I'm wondering if I need to purchase a physical TPMS and have it fitted inside the alloy.
     
  7. Liquidfusion-S3

    Liquidfusion-S3 I fall to peer pressure!

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    Ah nevermind, I should really read the manual before posting silly questions like this lol
     

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