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      10-13-2019, 03:21 PM   #4
doughboy
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Drives: 2018 M2 Comp 6MT
Join Date: Jan 2009
Location: UK

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Quote:
Originally Posted by GreyAggie View Post
I think I remember reading somewhere that the rear tire total diameter had to be slightly larger than the front for the car to not think the traction is slipping. Does anyone know what that ratio needs to be? I'm looking at a setup that is 26.2" in the rear and 26" in the front.

Would that work?

1. That's not right.TC uses the dynamic change of relative wheel speed, not absolute static relative speed.

2. When you reset your TPMS that zeros out wheel size differences due to wear and pressure.

i.e. worn rears / new fronts = 12mm diameter diff (1/2 inch) so talking about 0.2" pointless.

....and that's before you think about pressure which changes diameter even more.
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