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Put OEM C6 wheels on my car, and now my ABS keeps kicking in.

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Old 09-26-2009, 12:00 AM
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Default Put OEM C6 wheels on my car, and now my ABS keeps kicking in.
So I put some OEM 18/19 C6 wheels on my '99 WS6. I used the 1.25" adapters in the rear. Now, every time I brake, I can feel my ABS kick in, and it makes it difficult to brake. I have the stock brake setup and stock suspension. What can I do to fix this problem?
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Old 09-26-2009, 12:03 AM
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Originally Posted by photoman9988
So I put some OEM 18/19 C6 wheels on my '99 WS6. I used the 1.25" adapters in the rear. Now, every time I brake, I can feel my ABS kick in, and it makes it difficult to brake. I have the stock brake setup and stock suspension. What can I do to fix this problem?
What is the tire size? The overall diameter needs to be within 1/2 inch or it will trigger the ABS. I have OEM with 295/30 rear and 275/35 front with no issues.
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Old 09-26-2009, 12:05 AM
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265/35/18
295/30/19
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Old 09-26-2009, 04:28 AM
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Originally Posted by photoman9988
265/35/18
295/30/19
There's your problem: the 18s are 25.3 and the 19s are 26.1
Last edited by DaddySS; 09-26-2009 at 04:41 AM.
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Old 09-26-2009, 08:05 AM
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Originally Posted by DaddySS
There's your problem: the 18s are 25.3 and the 19s are 26.1
So what should I do?
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Old 09-26-2009, 08:48 AM
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Go to a 275/30/19 which would make the rears 25.5" tall...however, the ride will be VERY rough! That's the main reason I ended up ditching my C6's and went back down to 18's all the way around w/275/35/18's.
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Old 09-26-2009, 09:39 AM
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ive got c6 wheels, 305-30-zr19s on rear, 255-35-zr18s in the front....no issues whatsoever....
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Old 09-26-2009, 04:09 PM
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temporarily i guess you could disable the ABS.
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Old 09-26-2009, 04:21 PM
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Originally Posted by photoman9988
So what should I do?
If you replace the fronts with a 265 40 18 it will be 26.1 also
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Old 09-26-2009, 09:06 PM
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Would a simple reflash of the ECU to calibrate the tire size / speedometer make this problem go away?
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Old 09-26-2009, 09:30 PM
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Originally Posted by spaulsen
ive got c6 wheels, 305-30-zr19s on rear, 255-35-zr18s in the front....no issues whatsoever....
Not every car has issues with the difference in OD.
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Old 09-26-2009, 09:33 PM
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Originally Posted by photoman9988
So what should I do?
IMO the easiest solution is get on ebay and pick you up a pair of used 275/35/18s. They are one of the most common 18's, you can find a pair with 60-70% tread left for under $100 shipped almost any day.
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Old 09-27-2009, 09:12 AM
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Originally Posted by 1998Z28LOADED
IMO the easiest solution is get on ebay and pick you up a pair of used 275/35/18s. They are one of the most common 18's, you can find a pair with 60-70% tread left for under $100 shipped almost any day.
but would 275's even fit on 18x8.5's? I thought 265 was pushing it...
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Old 09-27-2009, 01:01 PM
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Let's start with what brand tires you have now?
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Old 09-27-2009, 07:29 PM
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Does the ABS light come on?
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Old 09-27-2009, 09:18 PM
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Originally Posted by photoman9988
but would 275's even fit on 18x8.5's? I thought 265 was pushing it...
Im pretty sure thats a 18x9 wheel
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Old 09-28-2009, 09:33 AM
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I have Pirelli P-zero Rosso's on.

Yes, my "ABS Inop" light comes on, and does my "TCS off" light. Also, every now and then when I first start up my car and take off, my "Low Trac" light will come on and REALLY screw up my braking until my abs light comes on.

I think they ARE 18x8.5 They are '09 C6 wheels, not Z06. They are the split spoke 18x8.5 and 19x10 i believe.
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Old 09-28-2009, 09:58 AM
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spaulsen's car is a 98 which had a unique ABS system vs. later years. photoman9988, what year is your car?
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Old 09-28-2009, 10:10 AM
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Originally Posted by Major_Lee_Slow
spaulsen's car is a 98 which had a unique ABS system vs. later years. photoman9988, what year is your car?
'99 with an '00 SS motor.
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Old 09-28-2009, 08:20 PM
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Looking at the pirellis, if you replace the fronts with 255 40s you'll be within .2 and will not trip the ABS.
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