Help with Tire sizes

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Jan 15, 2010 | 04:59 PM

C6BIX

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From: Round Rock Texas

Help with Tire sizes

GUys I am going to a 19 by 9.5 front and a 20 by10.5 rear

Will my computer in the car go off if I run a 275/30/19 Front and a 305/25/20 in the rear? I know the front over all diameter is real close but the rear is like 3.6% off.. Will that cause problems?

Jan 15, 2010 | 05:13 PM

0Anthony @ LGMotorsports

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From: Lewisville TX

St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13

Quote:

Originally Posted by C6BIX

Not right away, but it will as speed increases. The faster you go, the more difference there is going to be front to rear. With TC/AH turned off the car will not care but with it on, yes you may feel it come on for no real reason.

Jan 15, 2010 | 05:21 PM

C6BIX

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From: Round Rock Texas

So..

If i turn it off there are no issues? If its on it might just act up every once and a while? Its not going to throw some light on the dash or anything is it?

Jan 15, 2010 | 06:14 PM

0Anthony @ LGMotorsports

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From: Lewisville TX

St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13

Quote:

Originally Posted by C6BIX

If i turn it off there are no issues? If its on it might just act up every once and a while? Its not going to throw some light on the dash or anything is it?

No lights. What happens when you change tire size, especially front and rear being different is that it causes the car to think that they are turning different MPH, and because of the height of the tire, they are to some degree but it is basing this off of the height of the tire and the rolling diameter. So if it thinks the rear is turning faster it will think you are spinning the tires and try to apply the brakes or back off the throttle.

Turning TC/AH off tells it to not really care. ABS may still be effected depending on how far off it is.

Again it depends on how far off they are from factory and how far off it is front to rear as to how bad it will be and what MPH it really starts to come into a factor.

Jan 15, 2010 | 06:28 PM

C6BIX

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From: Round Rock Texas

SO is anyone else running this same tire setup on the C6? Is it working or not working for them?

Jan 15, 2010 | 06:37 PM

oldmansan

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From: Los Alamitos California

St. Jude Donor '09

Quote:

Originally Posted by C6BIX

SO is anyone else running this same tire setup on the C6? Is it working or not working for them?

Different brands/models of tires will have different overall circumferences. You haven't said what brand/model you're asking about.

I believe it is more important that the difference between the front and rear circumference is about the same as stock percentage-wise, not necessarilly that the actual circumference is the same as stock.

San

Jan 15, 2010 | 06:40 PM

C6BIX

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From: Round Rock Texas

Nito

I am going to the Nito Invos for the front and rear... the front is only 2 tenths taller and the back is like 8 tenths shorter.. What do you guys think?

Jan 15, 2010 | 07:35 PM

oldmansan

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From: Los Alamitos California

St. Jude Donor '09

Quote:

Originally Posted by C6BIX

I am going to the Nito Invos for the front and rear... the front is only 2 tenths taller and the back is like 8 tenths shorter.. What do you guys think?

I have about an inch difference with the rear being "taller" than the front and I have no issures. You're going to a taler front and shorter rear which isn't the direction I'd be heading. What is the overall circumference of the front and rear tire respectively?

San

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Jan 15, 2010 | 07:39 PM

oldmansan

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From: Los Alamitos California

St. Jude Donor '09

Quote:

Originally Posted by C6BIX

I am going to the Nito Invos for the front and rear... the front is only 2 tenths taller and the back is like 8 tenths shorter.. What do you guys think?

Your rear tire is only going to be .35 inches taller than the front. I don't know if that will work.

San