Will traction control activate with shorter tire??

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Mar 10, 2006 | 09:04 AM

#21

nam-vette

Cruising

Joined: Mar 2006

Posts: 11

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19's all the way around

You folks that are running 19's all the way, what size tires are you running that DO NOT kick in the trac.Cont? 2002 thru 04 are the same, as far
as T/Control , are they not?

Last edited by nam-vette; Mar 10, 2006 at 09:06 AM. Reason: add more

Mar 10, 2006 | 10:41 AM

#22

SmoothFRC

Melting Slicks

Joined: Dec 2002

Posts: 2,480

Likes: 62

From: Middletown DE

Quote:

Originally Posted by 6Speeder

There are different versions of software. My 2000 made without AH, is happy with the same diameter tires front and rear. After the rears wore down to where they were 1/4" shorter than the fronts (maybe one or two burnouts contributed), I started getting the service TS/ABS, and reduced engine power. Replaced the rears, and fine again.

Good point, my drag radials do not have the amount of tread that the fronts do, so they may be .1" smaller or something... Still something to consider it trying to run the same size all the way around, if you wear the rears down before the fronts - you would most likely still have this issue.

Mar 10, 2006 | 12:22 PM

#23

Bill Dearborn

Tech Contributor

Joined: Oct 1999

Posts: 41,058

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From: Charlotte, NC (formerly Endicott, NY)

Quote:

Originally Posted by SmoothFRC

Maybe the newer vettes dont have the problem with the same sizes all around, but on my 2000 i cannot run the same size. I believe there are different versions of AH amongst some of the years. FYI.

There are plenty of people with all year C5s running GS wheels with the same diameter tire all the way around. I have never heard of any of them having a problem.

I have found on certain tires it is best to check the tire mfgr's specs. The tires are not always the same diameter the calculator provides. They can be as much as a couple of tenths off. Just goes to show standards are not always followed exactly.

Bill

Mar 10, 2006 | 12:33 PM

#24

chocoholic

Burning Brakes

Joined: Oct 2001

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From: The Internet

FWIW, Bill, when I'm running the GS wheels and the same size tyres as you, TC does kick in around 68 MPH for me. I've seen others mention it too. It's moot though, as most people would have turned it off with that setup anyway.

As you say, it's most likely due to the difference in manufacturers specs and it's not really an issue in the real world either.

Mar 10, 2006 | 01:01 PM

#25

allanlaw

Le Mans Master

Joined: Sep 1999

Posts: 7,393

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From: Los Angeles CA

On C5's, the traction control is more forgiving than on the C6 when it comes to tire size (wheel size is not relevant). The TC is measuring the relative spin rates of the fronts to the rears and the car's speed, and this in turn (in a non-skid situation) is dictated by the relative diameters of the tires, not the wheels. Clearly running fronts with greater diameters than the rears will trip TC; probably 1/2" higher rears will be ok. The cure is to turn off TC - that's it. On my C6Z06, the TC algorithm is very unforgiving, and I have to run all the time (at speeds >80) with TC off when I have my track tires on the car (Nitto NT555RII's, 285/35/18 (25.91")- 305/35/18 (26.30") since the .4" difference is apparently not enough.

Last edited by allanlaw; Mar 10, 2006 at 01:04 PM.

Mar 12, 2006 | 09:04 PM

#26

nam-vette

Cruising

Joined: Mar 2006

Posts: 11

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tire size

I think it was hardtop Corvette was telling me that the 245/35/19 were 25.8 tall. If I went to a
235/35/19, how much shorter would it be??
I thank you for your assistance.