Summer tire cracking
Thread Starter
Racer
Joined: Jun 2015
Posts: 361
Likes: 116
From: Kentucky
Summer tire cracking
Hey guys, sorry if I missed this being discussed, my question is regarding the summer tires on the Z51. Does the cold temperature cracking issue we had on the Summer tires on the C7 still exist on the C8 Summer tire when exposed to and driven in 20 Deg or colder temps. I understand that the grip is greatly reduced, I'm concerned on damaging tires.
I asked my dealer and two different Reps at a couple of reveals. I have looked up info from Michelin as well with no luck. Is absence of this being discussed mean that there no longer is an issue?
Any Info would be appreciated.
VH
I asked my dealer and two different Reps at a couple of reveals. I have looked up info from Michelin as well with no luck. Is absence of this being discussed mean that there no longer is an issue?
Any Info would be appreciated.
VH
Le Mans Master
Joined: Dec 1999
Posts: 6,516
Likes: 4,840
From: One Hour From Boston!
No one has received their car yet so at this point it’s anyone’s guess. I will say not everyone had cracked summer tires on their Z51. My tires never cracked, had the car since 2014, and I’m in the Northeast.
Drifting
Joined: Jul 2019
Posts: 1,325
Likes: 701
Is the Z51 on Cup 2 tires? I live in Fl., but we did have a couple instances of getting into the high 20's when I owned my 911 Turbo and my tires were fine. I know my tires were Porsche spec Cup 2's with air so that doesn't really answer your question but just adding my 2 cents.
Last edited by usrodeo4; Sep 24, 2019 at 02:32 PM.
Instructor
Joined: Aug 2019
Posts: 203
Likes: 107
From: Derwood, MD
Hey guys, sorry if I missed this being discussed, my question is regarding the summer tires on the Z51. Does the cold temperature cracking issue we had on the Summer tires on the C7 still exist on the C8 Summer tire when exposed to and driven in 20 Deg or colder temps. I understand that the grip is greatly reduced, I'm concerned on damaging tires.
I asked my dealer and two different Reps at a couple of reveals. I have looked up info from Michelin as well with no luck. Is absence of this being discussed mean that there no longer is an issue?
Any Info would be appreciated.
VH
I asked my dealer and two different Reps at a couple of reveals. I have looked up info from Michelin as well with no luck. Is absence of this being discussed mean that there no longer is an issue?
Any Info would be appreciated.
VH
Last edited by MoveOver; Sep 24, 2019 at 03:02 PM.
Race Director
Joined: Jan 2005
Posts: 13,934
Likes: 4,257
From: NC
Is the Z51 on Cup 2 tires? I live in Fl., but we did have a couple instances of getting into the high 20's when I owned my 911 Turbo and my tires were fine. I know my tires were Porsche spec Cup 2's with air so that doesn't really answer your question but just adding my 2 cents.
Advanced
Joined: Jul 2019
Posts: 82
Likes: 42
From: upstate NY
Called summer tires for a reason and should not be driven in freezing temps. https://www.tirerack.com/tires/tiret...oaAlKYEALw_wcB this valid for any vehicle equipped with summer tires. If you want to drive in colder temps get all seasons.
Has nothing to do with the make/model of tire, or what make/model of car they're on. Summer tires shouldn't be used at temps below 45°F, and it typically states that cars should not even be moved when temps hit 20°F or below... that's where you're most at risk of cracking.
Last edited by 40hp VW; Sep 25, 2019 at 12:40 PM.
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Melting Slicks
Joined: Nov 2018
Posts: 2,096
Likes: 1,024
From: AA/Metro Detroit
All summer tires suck in those temps. In addition to all sucking, some will crack. Others will flatspot until you can get enough heat in them to go back to round. Just don't do it.
Why people spend so much on cars and then put inappropriate tires on them, I'll never know.
Why people spend so much on cars and then put inappropriate tires on them, I'll never know.
Last edited by jefnvk; Sep 24, 2019 at 05:28 PM.
Safety Car
Joined: Jul 2019
Posts: 4,079
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From: Florida
Pro
Joined: Jul 2011
Posts: 604
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Instructor
Joined: Aug 2019
Posts: 203
Likes: 107
From: Derwood, MD
Has nothing to do with the make/model of tire, or what make/model of car they're on. Summer tires shouldn't be used at temps below 45°F, and it typically states that cars should not even be moved when temps hit 20°F or below... that's where you're most at risk of cracking. also when you do European Delivery on a BMW which comes standard with summer tires, they have you put on (rent) all season or winter tires between October 15 and March 15, as it is the law in many European countries. https://www.bmwusa.com/european-delivery.html
Burning Brakes
Joined: Aug 2019
Posts: 1,088
Likes: 236
Never heard of cold cracking tires. My understanding it's UV radiation and ozone. I've driven Porsches with Dunlop, Pirelli P Zero, Michelin PS2, and Sumitomo summer tires in the canyons in sub 20 degree temps for nearly 20 years. Never any cracking. I do tip toe around on those ice cold roads however and don't see how quickly I can straighten out the curves.
Safety Car
Joined: Sep 2015
Posts: 4,785
Likes: 1,417
Holy crap... THere were SOME instances of Cup 2 tires cracking. They were sitting on railroad cars in SUB freezing temps for days.... THey tried to move the vehicles and the tires cracked. CUP 2 tires!
I don't know of any cracking issues on the PSS tires. But get anything cold enough and you can crack it...
I don't know of any cracking issues on the PSS tires. But get anything cold enough and you can crack it...