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ZL1 Wheels/Tires Wheels and tires discussion for ZL1

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Old 01-25-2013, 02:02 PM   #1
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ZL1 tires

I know this has been discussed and talked about before,but this just come out from GM today.....


Important Date:01/25/2013
Ref. number:Service / Service Operations / G_0000157402
Subject:ZL1 - 1LE Tires
GM CUSTOMER CARE & AFTERSALES

GMSO415
URGENT - DISTRIBUTE IMMEDIATELY


Date: January 25, 2013
SubjectZL1 - 1LE Tires
Models:Camaro ZL1 And 1LE
To:All Chevrolet Dealers
Attention:Service Manager, Sales Manager, Warranty Administrator, Parts Managers

The Camaro ZL1 and 1LE vehicles come standard equipped with 285/35ZR20 & 305/35ZR20 Goodyear F1 Supercar G2 D.O.T. approved ultra high performance summer tires with track capability.

Goodyear F1 Supercar Performance tires are a summer season tire and are not intended to be driven on snow, ice, or road surfaces below -7° C (20° F).

If the ambient temperature in your location is at or below -7° C (20° F), DO NOT MOVE THIS VEHICLE. The rubber used in these tires loses flexibility and may develop surface cracks in the tire tread/shoulder area at colder temperatures. Tire movement, when the temperature is below -7° C (20° F), may result in surface crack in the tread area of the tire. A surface crack on a tire is cosmetic and will not result in a loss of air

Example of a tire with a surface crack.





Special tread and compound used on these performance tires will cause a decrease in performance in cold climates, heavy rain, and standing water.

Driving on wet roads, in heavy rain, or through standing water with Summer Season Performance tires may result in hydroplaning and loss of vehicle control.

Driving with Summer Season Performance Tires on snow, ice, or cold road surfaces can cause loss of control or an accident

Refer to service bulletin 04-03-10-013G: Driving Characteristics of Rear Wheel Drive Vehicles and Available Winter Tires for further information on available winter tires.

Tire Storage
It is recommended for these tires to be stored indoors at temperatures above 20 deg F (-7 deg C) when not in use. If the tires have been subject to 20 deg F (-7 deg C) or less, let them warm up in a heated space to at least 40 deg F for 24 hours or more before installation or driving the vehicle. Inflate the tires only after they have been warmed above 40 deg F (5 deg C). Do not place tires near heaters or heating devices used to warm the room where the tires are stored. Do not apply heat or blow heated air directly on the tires. Always inspect tires before use after storage periods.


END OF MESSAGE
GM CUSTOMER CARE & AFTERSALES



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Old 01-25-2013, 02:17 PM   #2
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First they say not to drive them below 40 degrees but now it's 20? I'll follow the Goodyear bulletin
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Old 01-25-2013, 03:02 PM   #3
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This may be just to drive up sales during the winter. If it has to sit, it may as well sit at the dealership without a payment attached to it may be the thinking of many potential customers in the cold climate areas.
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Old 01-25-2013, 03:15 PM   #4
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Originally Posted by KKreme15 View Post
First they say not to drive them below 40 degrees but now it's 20? I'll follow the Goodyear bulletin
The original bulletin said not to drive on them below 40, and not to even STORE them at below 20.

Now they're saying not to even move the car below 20 because it might crack the tires.

Perhaps this was in part to address those people that thought they would still be able to store their cars outside or in an unheated garage for the winter months?

Either way, I played it safe and swapped my spare set of wheels/tires from my 2011 SS and put the ZL1 set in the basement.
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Old 01-25-2013, 09:53 PM   #5
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Im happy i have a heated garage. been at 50* all winter so far.
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Old 01-25-2013, 09:58 PM   #6
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I have decied I just don't like these tires for a street car. If lived in a warmer state they would not bother me the grip in low temperatures just is not woth it.

when these wear out michelin Super sports are going on.
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Old 01-25-2013, 10:33 PM   #7
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Nothing has changed here compared to the initial information.

The tires, being summer tires are not designed to be driven under 40ºF. They won't be damaged...but traction is significantly lowered under 40 until they warm up, similar to any summer tire. So the early thing was a warning (probably for legal purposes) to just not drive the car at all. (I've driven from as cold as 33º...a little common sense and caution goes a long way)

This notice mirrors exactly what the early information said: DO NOT DRIVE, or preferably, don't even STORE these tires under 20º. The rubber (apparently) becomes brittle. If you do store it...just don't move it, they'll be fine as soon as they warm back up to ambient temperatures.

Thanks for sharing again, MS3DALE.

The ZL1 and 1LE are no-compromises cars. They were built to go stupid-fast, end of story. This special care is part of that deal. I've experienced these tires on the track, and in the cold/wet weather. They're phenominal in the first case, and "good/okay" in the second case (as long as you recognize what you're driving...and using PTM mode 1 helps a lot). I intend to buy another set in a heartbeat. Plus - OE tires will allow me to keep Performance Traction Management fully-functional...other tires may not do that.

I park the car in the winter, anyways, so I guess the storage issue isn't a huge deal for me. If you don't, though - I hope you purchased a set of Blizzaks...
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Old 01-25-2013, 10:42 PM   #8
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Interesting. Real frikkin interesting.
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Old 01-25-2013, 10:57 PM   #9
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Quote:
Originally Posted by Mr. Wyndham View Post
Nothing has changed here compared to the initial information.

The tires, being summer tires are not designed to be driven under 40ºF. They won't be damaged...but traction is significantly lowered under 40 until they warm up, similar to any summer tire. So the early thing was a warning (probably for legal purposes) to just not drive the car at all. (I've driven from as cold as 33º...a little common sense and caution goes a long way)

This notice mirrors exactly what the early information said: DO NOT DRIVE, or preferably, don't even STORE these tires under 20º. The rubber (apparently) becomes brittle. If you do store it...just don't move it, they'll be fine as soon as they warm back up to ambient temperatures.

Thanks for sharing again, MS3DALE.

The ZL1 and 1LE are no-compromises cars. They were built to go stupid-fast, end of story. This special care is part of that deal. I've experienced these tires on the track, and in the cold/wet weather. They're phenominal in the first case, and "good/okay" in the second case (as long as you recognize what you're driving...and using PTM mode 1 helps a lot). I intend to buy another set in a heartbeat. Plus - OE tires will allow me to keep Performance Traction Management fully-functional...other tires may not do that.

I park the car in the winter, anyways, so I guess the storage issue isn't a huge deal for me. If you don't, though - I hope you purchased a set of Blizzaks...
It's not the same. The first one said not to drive them below 40*, this one says 20*

http://www.camaro5.com/forums/showthread.php?t=187045
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Old 01-25-2013, 11:30 PM   #10
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Originally Posted by KKreme15 View Post
It's not the same. The first one said not to drive them below 40*, this one says 20*

http://www.camaro5.com/forums/showthread.php?t=187045
The first bulletin is from Goodyear for the for the F1 Supercar. This bulletin is from GM. I am going to guess the difference is that the tires on the ZL1 are not normal F1 Supercars like the ones you would buy from Goodyear. From what I have heard the tires on our cars were made to different specs especially for GM. Therefore although similar they are essentially 2 different tires. Hope this makes sense.
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Old 01-26-2013, 12:11 AM   #11
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It was 75 here today.

tramtwo posted this on the go
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Old 01-26-2013, 12:30 AM   #12
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The first bulletin is from Goodyear for the for the F1 Supercar. This bulletin is from GM. I am going to guess the difference is that the tires on the ZL1 are not normal F1 Supercars like the ones you would buy from Goodyear. From what I have heard the tires on our cars were made to different specs especially for GM. Therefore although similar they are essentially 2 different tires. Hope this makes sense.
It's a good point, but it's still almost the same warning. The cracks in both tires were probably cause by driving in temps in the 20s or below. The first warning said Goodyear doesnt recommend driving on these tires below below 40, but both warnings said when the temp gets around 20 that the sidewalks could start splitting.
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Old 01-26-2013, 11:14 AM   #13
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Really? Geez! So what would be a good year round tire where temps can be 0 or 90, not in the same day of course?
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Old 01-26-2013, 01:58 PM   #14
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Great information. Has anyone seen a credible (manufacturer) recommendation for a replacement All-Season tire for the ZL1?
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Old 01-26-2013, 04:06 PM   #15
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even at 40f or 20f .it's time to park it.
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Old 01-26-2013, 05:17 PM   #16
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Really? Geez! So what would be a good year round tire where temps can be 0 or 90, not in the same day of course?


Move to Chicago you can get pretty close to that much of a temp swing. Its like they always say in Chicago, "If you dont like the weather wait 15 min." In a weeks span here it is going to go from -7* to 50* in f-ing january, wtf?

Im happy i have the heater i do in the garage, i feel bad for the people that have to deal with this. Another stress to go along with the car.
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Old 01-26-2013, 05:23 PM   #17
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Agreed

Quote:
Originally Posted by Mr. Wyndham View Post
Nothing has changed here compared to the initial information.

The tires, being summer tires are not designed to be driven under 40ºF. They won't be damaged...but traction is significantly lowered under 40 until they warm up, similar to any summer tire. So the early thing was a warning (probably for legal purposes) to just not drive the car at all. (I've driven from as cold as 33º...a little common sense and caution goes a long way)

This notice mirrors exactly what the early information said: DO NOT DRIVE, or preferably, don't even STORE these tires under 20º. The rubber (apparently) becomes brittle. If you do store it...just don't move it, they'll be fine as soon as they warm back up to ambient temperatures.

Thanks for sharing again, MS3DALE.

The ZL1 and 1LE are no-compromises cars. They were built to go stupid-fast, end of story. This special care is part of that deal. I've experienced these tires on the track, and in the cold/wet weather. They're phenominal in the first case, and "good/okay" in the second case (as long as you recognize what you're driving...and using PTM mode 1 helps a lot). I intend to buy another set in a heartbeat. Plus - OE tires will allow me to keep Performance Traction Management fully-functional...other tires may not do that.

I park the car in the winter, anyways, so I guess the storage issue isn't a huge deal for me. If you don't, though - I hope you purchased a set of Blizzaks...
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Old 01-26-2013, 08:09 PM   #18
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I have driven in temps far as 27 degress and I've notice a lot less traction, but the tires are still usable at low temps.
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Old 01-26-2013, 08:50 PM   #19
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Guess I'm breaking the "rules" ...again......I have been driving mine in 20-30 deg weather and yes the tires have much less traction than in the summer. does any of this have to do with over inflation in cold weather? I keep my fronts right at 32 lbs and rears at 35 in the winter ...I will be inspecting them tomorrow ...just to make sure everything is ok.
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Old 01-26-2013, 09:12 PM   #20
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Was running a little late this morning, had a appointment for tint at 9am and a basketball game at noon 22mi. In each direction. At 15 til I was on my way , it
Was 28 deg. With a high end radar/laser det. I proceeded to my destination at
100 for 22mi. And temp dropped to 27 half way there . Never had a issue, and I
Frequently drive in cool or cold temps but has always been above 20. I always inspect my tires and there always ok. I just had them off for cleaning the inside
Of the rims and inspecting/cleaning the inside tire wall. I have also had it completely sideways at 60mph @ temps in the fifties . Was asked by a service
Mgr. to let it eat, so bright me turned all the nannies and let it go. Not too bad til
Midway to upper rpm's and a hard shift, and then almost s**t my self. She came
Back around and hooked right back up . Anyway, I shall not do that ever again.
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Old 01-26-2013, 09:13 PM   #21
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Guess I'm breaking the "rules" ...again......I have been driving mine in 20-30 deg weather and yes the tires have much less traction than in the summer. does any of this have to do with over inflation in cold weather? I keep my fronts right at 32 lbs and rears at 35 in the winter ...I will be inspecting them tomorrow ...just to make sure everything is ok.
I've been keeping mine at 30psi
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Old 01-26-2013, 09:24 PM   #22
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I'm guessing that you can drive in lower temps but you risk the chance of having splits in your tires. I may just go to summer wheels and tires and winter wheels and tires and be done with it.
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Old 01-26-2013, 09:39 PM   #23
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It was 75 here today.
Yeah I think I'm good.

But a great thread none the less.
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Old 01-26-2013, 10:02 PM   #24
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Originally Posted by zl1fun View Post
Guess I'm breaking the "rules" ...again......I have been driving mine in 20-30 deg weather and yes the tires have much less traction than in the summer. does any of this have to do with over inflation in cold weather? I keep my fronts right at 32 lbs and rears at 35 in the winter ...I will be inspecting them tomorrow ...just to make sure everything is ok.
You and me both, I haven't bought winter tires and I just recently bought mine. I haven't slammed it or anything like that. I also check my tires and no issues as of yet.

It has actually snowed here as well the past 2 days, which I didn't drive it but still taking precautions...
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Old 01-26-2013, 10:07 PM   #25
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I don't like these tires in general, when it was 80 degrees outside I still had a hard time getting these to grip, they always feel like a hard compound, and I suspect that is what makes them crack at these low temps, they are so hard the contraction and stress makes them crack. I used multiple PTM Mode settings as well. When the track opens back up in march I plan on using these up so I can get some Michelin's. These goodyears have been awful tires IMO, and I am usually a fan of Goodyears.
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