Can we determine the Ratings of out factory tires.......... - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-28-2004, 03:44 PM   #11
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Mine calls for Z-Rated. Strange as that might sound...
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Old 04-28-2004, 05:43 PM   #12
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Quote:
Originally Posted by ssesc93
Mine is rated Z. Why is it that my car only does 121?
Because your car originally came with tires that were not Z-rated. And the 121 limiter is in the PCM....
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Old 04-28-2004, 07:55 PM   #13
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His car could have come with z rated tires. Mine did.
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Old 04-28-2004, 08:21 PM   #14
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Quote:
Originally Posted by jwikoff99
His car could have come with z rated tires. Mine did.
Brand new from the factory?
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Old 04-28-2004, 08:22 PM   #15
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yup
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Old 04-28-2004, 08:47 PM   #16
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Mine did too.
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Old 04-28-2004, 10:17 PM   #17
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Impressive! I know a lot of car manufacturers put speed limiters in there because they don't install Z-Rated tires on their cars from the factory, and they don't want a 'liability' because of that. I stand corrected!
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Old 04-29-2004, 12:48 AM   #18
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how can we find this out if we DONT have this sticker on our car? lol.... my car had been repainted awhile back and the stickers were removed but never put back on....
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Old 04-29-2004, 12:48 AM   #19
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well lets see know, I do need a tune up and some moe things done to the car and some tiires. If I do all of this, I might be able to do the Z-rated limit. That would be nice. Then after that I will never speed again......
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Old 04-29-2004, 12:59 AM   #20
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Why would my car come equipped with Z rated tires from the factory yet the ECM shuts down my car at 116? Doesn't seem to make much sense if you ask me.
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