Difference between front and back tires

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Oct 9, 2010 | 08:08 PM

Irish Whiskey

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Melting Slicks

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Difference between front and back tires

If the total diameter between the front wheel/tires and the back wheel/tires excedes the allowable difference, I know the speedometer will be wack - what else goes wack, ABS???

Oct 10, 2010 | 08:36 AM

99 vett babycar

Melting Slicks

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From: pawleys island sc

if the difference is large enough the car will go into Reduced Power Mode.

Oct 10, 2010 | 08:40 AM

Mark C5

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From: Indian Rocks Beach FL

St. Jude Donor '08-'09-'10

If the rear tires are the same diameter or smaller than the front your traction control system will activate at very inopportune times. Generally speaking you want to keep the rear wheel/tire combo 1/2 to 1 inch taller.

Oct 10, 2010 | 09:21 AM

leadfoot4

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From: Western NY

Quote:

Originally Posted by Irish Whiskey

If the total diameter between the front wheel/tires and the back wheel/tires excedes the allowable difference, I know the speedometer will be wack - what else goes wack, ABS???

The car's onboard computer looks to see the difference between the car's front wheel RPM and rear wheel RPM. There is a specified difference that the computer expects to see. If that expected difference in wheel speeds is exceeded, the computer then calculates it as either "skidding" or "excessive wheelspin", and engages either the ABS, Traction Control, or the Active Handling, in order to resolve the "problem".

In your example, with the rear tire's OD being "too small", the computer preceives this as "wheelspin", and the traction control activates, reducing power, until traction is achieved. However, since the tires are the cause, and a constant, the problem can't resolve, so you'll be in reduced power mode all the time.

Oct 10, 2010 | 04:44 PM

vetteman741

Burning Brakes

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From: Motorsports Capital of the World..Indianapolis Indiana

makes me wonder if the moron I saw with gold 20" donks all around on his C5 has problems

To each their own,

Oct 10, 2010 | 08:56 PM

m6 c5

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From: Yorktown Virginia

If the rear tires are too small then you can just turn off traction control and drive normally, but its not a good idea to do this unless its only temporary.

Oct 11, 2010 | 07:22 AM

leadfoot4

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From: Western NY

Quote:

Originally Posted by vetteman741

makes me wonder if the moron I saw with gold 20" donks all around on his C5 has problems

To each their own,

Of course he has problems...beginning with his desire to have 20" gold donks on his car!!

Oct 11, 2010 | 03:36 PM

Toque

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From: Wylie TX --> Less is More, except under the hood !

Read my post on the subject. It should help...

http://forums.corvetteforum.com/c5-g...ah-issues.html

Toque

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Oct 11, 2010 | 03:46 PM

Hamze

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Got 20's on all 4 corners since 5 yrs now with zero issues! also got 19's all around on my previous c5 for also 5 yrs... no issues at all!

Oct 11, 2010 | 09:45 PM

#10

vetteman741

Burning Brakes

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From: Motorsports Capital of the World..Indianapolis Indiana

my bad

Quote:

Originally Posted by Hamze

Got 20's on all 4 corners since 5 yrs now with zero issues! also got 19's all around on my previous c5 for also 5 yrs... no issues at all!

They look good in that color wheel

, do you have different size tire diameter f&r, do they rub....ever

Nice body kit too

Oct 12, 2010 | 12:00 PM

#11

Hamze

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Quote:

Originally Posted by vetteman741

They look good in that color wheel

, do you have different size tire diameter f&r, do they rub....ever

Nice body kit too

Thank you bro!

rims are 9.5' wide .. front tires are 255 35 20 , and the rears are 275 35 20. The fronts rub a little when i go over a speed bump only. i will fix the issue when i install my tpe t2 flares, i will install lower profile tire at the front and 345's at the rear hopefully

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