colnagoG60

Keep an eye on those tread blocks:

"Note: Tires exposed to temperatures of 20 degrees F (-7 degrees C) or lower must be permitted to gradually return to temperatures of at least 40 degrees F (5 degrees C) for at least 24 hours before they are flexed in any manner, such as by adjusting inflation pressures, mounting them on wheels or using them to support, roll or drive a vehicle.Flexing of the specialized rubber compounds used in Max Performance Summer tires during cold-weather use can result in irreversible compound cracking. Compound cracking is not a warrantable condition because it occurs as the result of improper use or storage, tires exhibiting compound cracking must be replaced."

Taken from the PS4S description:

https://m.tirerack.com/tires/descrip...Yellow+Caliper

ParadiseGT3

Right, spare this guy the details.

Maybe we should set the bar higher than successfully pulling out of the driveway.

At or near highway speeds, wet roads, winter temps, and an emergency stop scenario, you'll wish you had grandma's Corolla.

If you've never felt the point at which summer tires become "just hard rubber," then it's easy to be cavalier on the subject. They are laughably incapable.

Try them in your driveway with 1/8" of snow and go from there.

eviligloo

Don't risk it. Summer tires shouldn't be used under 40 degrees because it will lessen your grip and increase your stopping distance as the rubber gets harder. I tried to push michelin summer tires and limp through the winter a couple of years ago and ended up in a deep ditch on the side of the road. Wasn't driving or braking aggressively. Only going about 35mph onto an on ramp. I was being extremely gingerly with inputs and the car went straight instead of gently to the right.

Cracked the front bumper and bent the exhaust. Correct tires would've been much cheaper than what i had to pay to fix. Wasn't with a porsche but the same principle applies.

CSLSuperfan

Is this the UV RS on 911UK??
Great colour. It was the standout livery in 2016. Cup 2's are fine for all year driving. One caveat : leave the car on the drive if there's any level of snowfall!!

Taffy66

I have first hand experience with Cup 2s in snow. A couple of years ago in February I was driving home from my dealer after having the CF steering wheel fitted to my 2019 RS WP. It was hovering just above freezing and it was fairly dry when I left the dealership. However after a few miles driving on a very busy three lane motorway it started raining torrentially . My RS was aquaplaning constantly and I slowed down to the middle lane and proceeded cautiously until the unthinkable happened !
Out of nowhere we suddenly hit 4-5'' of slushy snow with none falling at the time to give us prior warning. All three lanes were very busy and the first cars decided to panic and slam the brakes on forcing all following traffic to follow suit including yours truly. Trouble is my RS was shod with stone cold Cup 2s and despite my steadiest braking the car just slid like an ice skater !. The cars in front were slowing at a far faster rate than I was and as I managed to get the RS down to 15-20mph I faced an imminent rear end impact on the car in front of me. In a split second decision I concluded it was better to swing the RS towards the central reservation hoping the kerb would stop me unscathed. It did but the front driver's side corner bumper hit the crash barrier. The damage was purely cosmetic but as the force chipped both the CF front wing and bonnet both had to be replaced as well.
It cost the insurance company a pretty penny due to Carbon Fibre but I'm pretty confident if I was on MP4Ss the collision would have been avoided, To recap, in any snow there is hardly any braking ability on any car shod with Cup 2s no matter what anyone tells you. You have to experience it first hand which is quite something.