Differance in size before the lights come on

Originally Posted by Rusty Searched, but didn't find what I was looking for. Question is how much differance can you have between the front tire and rear tire in diameter

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Differance in size before the lights come on

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09-17-2014, 10:47 AM

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FPenvy

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Quote:

Originally Posted by Rusty

Searched, but didn't find what I was looking for. Question is how much differance can you have between the front tire and rear tire in diameter before it affects the computer? Reason is, I have to order new rear tires. I corded them at my last trackday. The front tires are 275/35-19, 26.6" in diameter, and they are still good. The old 325/30-19's are 26.7" in diameter. Wondering if I could go to 345/30-19, 27.2" diameter without the lights coming on.

whenever i was buying my newest set of tires someone mentioned the acutal amount of difference where it messes up the ECU but for the life of me i cant remember.

i'm running 265/35/19 and 305/30/19 RE-11's and have no light. not sure of the specs of their diameters at the moment.

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