tmslc

yeah, here in salt lake city temps just dropped. driving home last night was interesting. 🙃

awaiting newly ordered 19/20 winter tire set.

brownan

Terrible idea to use summers anywhere below 40. Get yourself a second set of wheels and some winters. 911 makes a great four seasons car on the right tires.

tmslc

very true. driving in ~ 35 degree temps yesterday drastically change tire characteristics. luckily i timed things so i wasn't out long and my rears are at 5mm anyway so they are getting swapped and hope to get a another 3-4K miles out of them.

car is in the garage until i can get my winter set.

drcollie

I have never, ever seen summer tires "crack" from cold, I think that is an old wives tale. Has anyone here actually seen that happen?. I have seen them crack from Ozone exposure.....

The compounds are much softer, so your hazard is in severe loss of traction. as temps drop. I switch to my Ford Ranger or Cayenne GTS on All Seasons for the winter months, but I always take my 992 out at least once a month for a short and slow drive of a few miles to keep the oil circulating in the engine. I am careful to not push the car hard - but no signs of any tire issues as far as "ruining" the summer tires below freezing temps

m732sg

Kind of where my head is at going into my first winter with my 992. My last M3 had AS3+'s so wasn't an issue.

pnw122

For context i have a 24 Cayenne Coupe I am picking up tomorrow and will put good winters on it. I only plan to drive the 911 1-2 times per month in the winter, mostly to keep the battery in check and will wait for days its >40. I would say >60% days in the winter months here are >40 anyways.

Jeahbladejeah

And what exactly would cause the cracking anyway? It can't be simply cold exposure otherwise the same would happen to parked cars -- it must be heat-cycle related. Maybe warming the tires under load and then quick cooling due to low air temps...? Or the whole tire carcass is too cold so the heat from friction can only penetrate superficially? I suspect there would be degrees to potential damage based on max tire surface temps, which can be dialed back based on driving input.

Really curious if anyone can give an actual explanation.

911boy

I have never heard of or seen a tire crack due to temp either. I always put winter tires on OEM wheels and get a cool set for summer.

tmslc

it’s says summer tires harden and your braking distance drastically changes (unfavorably) in the manual and on the porsche website.

do what you will i suppose.

911boy

Braking and overall traction is drastically different on summer tires in cold temps. Cracking is strange but I'd never drive on summers in winter....got caught once.

3rdpedal

The cost at a good shop (you don't have to have the dealer do it as they will charge $150-250 each swap) is $80-95 per swap. So I pay less than $200 a year to swap and I figure I get to keep my oem look and not spend the $$ on extra wheels.

You CAN get the 19/20 base Carrera wheel from Porsche/Suncoast, and in that event you do likely have more options for tires, and the actual tire set will cost a little less at the reduced sizes. They say that more sidewall and narrower tire will help with snow traction. THAT said, my oem wheels look fantastic after 2 winters, and it's easy to grab my 4 tires off the rack in the garage (they weigh less), run them down to the tire shop and then take the car over there. They take care of me well and let me move the car in and out of the bay.

I tend to drive around 2-3k miles or so each winter, trying to drive my car 2-3 days a week if not more. But Denver doesn't get tons of snow, just more sustained cold temps. The tougher part honestly about winter, is keeping the car clean. I prefer to wash it on my own, and don't like taking it anywhere. Hard to do in 30 degree weather. So I pull out the pressure washer and foam cannon on those 60 degree days.

jlegelis

While I've never seen or experience cracking myself, and have certainly driven summer tires in even snowy conditions (not recommended) it is definitely real for a least a small number of tire types. Note that the concern is listed as 'cosmetic', but cracks are still cracks. See NHTSA notice here: https://static.nhtsa.gov/odi/tsbs/20...83781-9999.pdf

22992

I think it is actually the temperatures. To get sticky rubber, they use a compound that loses flexibility in the cold. The tire gets hard and brittle in cold temperatures and therefore cracks as it flexes during operation.