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      09-26-2020, 04:13 PM   #1
RSnic
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Dumb TPMS Question

Hi,

I have a '20 M340 with a non-square tire set up:
• Front: 225/40 R19
• Rear: 255/35 R19

My question: How do I set up TPMS. If I use Automatic, it selects rear size. If I select Manual, I have choice of All Season or Winter. Or doesn't it matter?

I know that tire pressure reading is close to what I get from my own gauge

Thanks
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      09-26-2020, 04:22 PM   #2
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Doesn't matter. The TPMS send a signal on a 433mhz frequency and tire/wheels size has no bearing on them syncing. The only reason you see the different seasons is most likely due to the large swings in temperature which impacts tire PSI.
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