Rear tire wear and TPS

djsilverjohnson · 11-28-2021, 03:45 PM

We've had several BMW's and they've all eaten rear tires at about twice the rate as fronts at the OEM designated. They all wear right down the middle, which is a classic symptom of over-inflation. Since we went to a square setup on my wife's car I still see the same pattern. I've lowered the rear tire pressure several pounds to compensate, but that triggers the TPS warning that stays on all the time.
1. What is the range of acceptability for the TPMS system?
2. Is there any way to adjust those ranges?

Thanks!

dmz_m3 · 11-28-2021, 06:24 PM

I'm not sure about the answers to your questions, but you could code out the TPMS completely

amrazM · 11-29-2021, 05:21 AM

Sounds like you may want to do away with the TPMS system and code it out of the car.

SilverSlug · 11-29-2021, 05:31 AM

I believe the TPMS triggers the light once the PSI drops to 25% (or more) below the suggested PSI… which I believe is 36 PSI (therefore anything below 27 PSI would trigger light).

I don't believe that threshold is easily adjustable, but if it's possible amrazM is the one who would know.

shimmy23 · 11-29-2021, 08:46 AM

What are your tire pressures? Honestly have not had this issue to the extent that it's made we consider the above posts. These cars eat thru tires, it's part of the fun!

djsilverjohnson · 11-29-2021, 08:55 PM

I don’t recall what the sticker says for fronts (32,34?), but for the original rear 265/x/19’s it was 38psi. I switched to to a square setup of 275/30/18’s on 18x9.5’s and started at 38. I already see premature wear on the backs and dropped them to 36 front and 34 rear.

11-28-2021, 03:45 PM	#1
djsilverjohnson Private First Class 116 Rep 159 Posts Drives: 2013 E93 M3 Join Date: Feb 2020 Location: Georgia iTrader: (0)	Rear tire wear and TPS We've had several BMW's and they've all eaten rear tires at about twice the rate as fronts at the OEM designated. They all wear right down the middle, which is a classic symptom of over-inflation. Since we went to a square setup on my wife's car I still see the same pattern. I've lowered the rear tire pressure several pounds to compensate, but that triggers the TPS warning that stays on all the time. 1. What is the range of acceptability for the TPMS system? 2. Is there any way to adjust those ranges? Thanks!
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11-28-2021, 06:24 PM	#2
dmz_m3 ///M Enthusiast 114 Rep 71 Posts Drives: '13 E92 M3 ZCP Join Date: Apr 2021 Location: Toronto,Canada iTrader: (0)	I'm not sure about the answers to your questions, but you could code out the TPMS completely
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11-29-2021, 05:21 AM	#3
amrazM mTekMods 2132 Rep 2,893 Posts Drives: like a granny. Join Date: Jan 2010 Location: Manhatan iTrader: (1)	Sounds like you may want to do away with the TPMS system and code it out of the car. __________________ 2011 Frozen Black/Fox Red E90 M3 650+WHP G-Power Supercharged First DCT to Manual Conversion Worldwide KW CS, BBS RI-A, BW Headers, Snow 2.5
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11-29-2021, 05:31 AM	#4
SilverSlug Hey, where have you been all my life? 680 Rep 1,401 Posts Drives: 2011 M3 6MT Join Date: Jul 2018 Location: San Francisco, CA iTrader: (2)	I believe the TPMS triggers the light once the PSI drops to 25% (or more) below the suggested PSI… which I believe is 36 PSI (therefore anything below 27 PSI would trigger light). I don't believe that threshold is easily adjustable, but if it's possible amrazM is the one who would know.
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11-29-2021, 08:46 AM	#5
shimmy23 F15 daddymobile 2341 Rep 3,507 Posts Drives: GS X5 Join Date: Aug 2011 Location: WA iTrader: (3)	What are your tire pressures? Honestly have not had this issue to the extent that it's made we consider the above posts. These cars eat thru tires, it's part of the fun! __________________ -brandon F15 Glacier Silver journal
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11-29-2021, 08:55 PM	#6
djsilverjohnson Private First Class 116 Rep 159 Posts Drives: 2013 E93 M3 Join Date: Feb 2020 Location: Georgia iTrader: (0)	I don’t recall what the sticker says for fronts (32,34?), but for the original rear 265/x/19’s it was 38psi. I switched to to a square setup of 275/30/18’s on 18x9.5’s and started at 38. I already see premature wear on the backs and dropped them to 36 front and 34 rear.
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