Tire diameter vs Wheel speed sensors

R3dn3k Flyby · 07-05-2011, 03:03 PM

How big of a difference in tire diameter (front vs rear) before the wheel speed sensors will trip out and trigger the DTC?

I ran 235/45/17 F and 245/40/17 R on my e36 M3. It tripped the ASC due to there being almost a full inch in tire diameter difference. I later deleted the ASC and forgot about it.

225/40/18 F and 255/35/18 R on my e92 seems like a big gap. I'm pretty sure that gap is leading to some unnecessary understeer.

I'm considering running 235/40/18 up front and 255/35/18 out back.

That'll bump the diameter difference from .12" more in the front to .43" more in front.

R3dn3k Flyby · 07-06-2011, 02:31 AM

Anybody?

cdgatti · 07-06-2011, 07:57 AM

Quote:

Originally Posted by R3dn3k Flyby

Anybody?

Have you tried correcting your understeer feeling with tire pressure manipulations yet?

R3dn3k Flyby · 07-06-2011, 09:51 PM

Quote:

Originally Posted by cdgatti

Have you tried correcting your understeer feeling with tire pressure manipulations yet?

No. Tire pressure is set to factory specs.

07-05-2011, 03:03 PM	#1
R3dn3k Flyby BigMacs 73 Rep 492 Posts Drives: 2019 BMW M5 Join Date: Oct 2009 Location: Queen Creek, AZ iTrader: (5) Garage List 2019 BMW M5 [9.67]	Tire diameter vs Wheel speed sensors - How big difference? How big of a difference in tire diameter (front vs rear) before the wheel speed sensors will trip out and trigger the DTC? I ran 235/45/17 F and 245/40/17 R on my e36 M3. It tripped the ASC due to there being almost a full inch in tire diameter difference. I later deleted the ASC and forgot about it. 225/40/18 F and 255/35/18 R on my e92 seems like a big gap. I'm pretty sure that gap is leading to some unnecessary understeer. I'm considering running 235/40/18 up front and 255/35/18 out back. That'll bump the diameter difference from .12" more in the front to .43" more in front. __________________ 2019 M5 : Black Sapphire Metallic / Black Full Merino / Carbon / B&W / Executive / Driving Assistance Plus / BMW Performance Carbon Fiber Front Splitters, Side Skirts, Rear Diffuser, Trunk Spoiler 2020 RDX A-Spec : Apex Blue Pearl / Red
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07-06-2011, 02:31 AM	#2
R3dn3k Flyby BigMacs 73 Rep 492 Posts Drives: 2019 BMW M5 Join Date: Oct 2009 Location: Queen Creek, AZ iTrader: (5) Garage List 2019 BMW M5 [9.67]	Anybody? __________________ 2019 M5 : Black Sapphire Metallic / Black Full Merino / Carbon / B&W / Executive / Driving Assistance Plus / BMW Performance Carbon Fiber Front Splitters, Side Skirts, Rear Diffuser, Trunk Spoiler 2020 RDX A-Spec : Apex Blue Pearl / Red
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