New tires/traction control

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May 21, 2009 | 12:11 AM

rebelheart

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From: Lacombe Louisiana

New tires/traction control

I am putting some 245/40-18 tires on the front, they have a circumference of 80.8 and a diameter of 25.7 with a rev/mile of 784,on the back I am putting 305/30-19 with a circ of 82.3 inches and a diameter of 26.2 with rev/mile of 770. the tire calculator site says this is a difference of 1.9% Does anyone know if this will mess with my traction control?

May 21, 2009 | 01:38 AM

KRISCO

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From: Spokane WA

I think if you maintain atleast 1\2 inch you are ok. Im sure someone will verify this.

May 21, 2009 | 12:28 PM

Oldvetter

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From: Waldorf MD

They are right, 1/2 inch is the minimum difference. Stock tires have 1 inch difference.

May 21, 2009 | 12:42 PM

Shirl

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Mine are a little less than .5 difference in diameter and I have no traction control issues (>>knock on wood). When I had the same size tires all the way around, I would get the traction control randomly coming on and even slowing the car down at times. You should be fine with that combo.

May 21, 2009 | 02:00 PM

Oldvetter

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From: Waldorf MD

Quote:

Originally Posted by Shirl

Remember, on a Corvette the rear tires tend to wear down faster than the fronts, so you don't want to have this problem later (after some wear).

May 21, 2009 | 02:31 PM

Shirl

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Quote:

Originally Posted by Oldvetter

Remember, on a Corvette the rear tires tend to wear down faster than the fronts, so you don't want to have this problem later (after some wear).

That's a good point. I also run the fronts with a little "less" air pressure.

Last edited by Shirl; May 22, 2009 at 12:35 PM.

May 21, 2009 | 05:48 PM

rebelheart

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From: Lacombe Louisiana

Thanks guys,this is pretty much what I had read!

May 26, 2009 | 11:36 PM

roysvett

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i have the same issue with 315 35 17 all the way around on 17x11 up front and 17x12 they are CCW 3 piece race wheels as soon as i get on it the tcc comes on can i tune this out in hp tuner in the tire size calculator