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Run 'Em Til They Cord--or Not?

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Old 07-21-2008, 09:14 AM
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sefa01
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Default Run 'Em Til They Cord--or Not?

Ran Pocono this weekend in my C6 Z06 and saw that the rear tires--OEM Goodyear EMT run-flats--are now down to the wear bars. This is an extra set of tires just for the track. I'm planning to run NJ Motorsports next month and would just assume run these until they cord. Any comments?
Old 07-21-2008, 09:48 AM
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AU N EGL
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wear bars is just right for OEM or treaded tires.

Go for it
Old 07-21-2008, 10:33 AM
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95jersey
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I do! Tires are expensive, the only reason I can think of why you would NOT is heat cycles and degraded performance of a tire that has been through that many heat cycles, but we are doing HPDE, not racing, so I personally don't care.

I have gotten several days on Hoosiers and Kuhmo's when I went past the wear bars as a reference.
Old 07-21-2008, 10:39 AM
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VetteDrmr
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My motto is: "I may be slow, but I'm cheap!"

I run my Toyo RA-1s down 'til they cord. This weekend the radial grooves were completely gone on one front, just a shadow on the other, and I got four sessions out at Motorsports Ranch with one just showing a wisp of cord on the inner shoulder. They're pretty dead as far as autocross goes, though, so I'm swapping them out for some Hoosiers

Have a good one,
Mike
Old 07-21-2008, 10:40 AM
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AU N EGL
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Originally Posted by VetteDrmr
My motto is: "I may be slow, but I'm cheap!"
and ON THE TRACK
Old 07-21-2008, 10:44 AM
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davidfarmer
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yes, run them till they die. We've chorded a few sets of the Z06 tires so far, and you might as well get your money's worth.

Those particular tires don't seem to fall off performance wise until you actually lose a significant portion of rubber, unlike race tires where the rubber actually seems to get harder the deeper you go (just my feelings)
Old 07-21-2008, 11:18 AM
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VetteDrmr
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Originally Posted by AU N EGL
and ON THE TRACK
Too much fear to have any fun on the street!
Old 07-21-2008, 11:32 AM
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the blur
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You can even get another session after they cord.
after the cords come the steel belts, then the rubber liner.
although traction starts falling off rapidly with the cords showing
Old 07-21-2008, 11:50 AM
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Aardwolf
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I have found that the rubber gets hard and traction goes down. I like to replace them at the bars because of this. It's up to you!
Old 07-21-2008, 12:10 PM
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VetteDrmr
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Originally Posted by Aardwolf
I have found that the rubber gets hard and traction goes down.
Yeah, but these are runflats, so they're hard when new!

Have a good one,
Mike

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