Angelus666

Hi all, I've been running my 991.1 RS on 2020 Cup 2's since I bought the car in November, and I was expected to urgently need to change these given the reputation for being 'lethal' in the cold or wet. Well, given we are in mid January (UK weather is 5-8 degrees and rain every other day) I haven't had any particular scary moment yet, I'm not saying they are the grippiest tyres in this weather, but they aren't as bad as the reputation might lead you to believe. I was going to chuck on 4s's up until March but I'm thinking I might just hold off and see how things go.

Be interested to read others experience.

colnagoG60

Good luck with that. It's not just the grip you may have to worry about:


https://rennlist.com/forums/992/1284...ter-tires.html

darylbowden

Maybe you're less ham fisted than I am, but I hate driving my 991.2 in the rain with Cup 2s (and I live in LA so it's definitely warmer). I can certainly do it, I just need to be super sensitive to the application of throttle and brakes but it sucks to drive a GT3 like a Camry in wet weather. Now, it could be because it rains less in LA so there is more oil, etc on the surface, but compared to my old 991.1 C2 with PS4S, I could drive that car as hard as I wanted to in the rain and the grip would be there all day. Luckily my 964 engine rebuild is almost done so I can go back to using that in the wet instead of venturing out in the GT3.

FWIW, the Cup 2s are still better than the horrible Pirelli P Zeroes my 991.1 C2 came with as OEM tires in the wet.

RonnyC

Even in the warmer months how many of us actually get our Cup 2's to proper temperature on the road. I don't mind the Cup 2's for normal driving, I do have experience with the PS4's but on the GTS. Don't drive in the rain nor temperature cooler than 10 degrees Celsius.
From my experience on the road, and in weather I described above I find little difference between the two. Maybe a car thing between the GTS and GT3 - but when my tires wear out I'm back on Cup 2's.

I heard the new Cup 2's for the Porsche's were made to be more everyday usable.

Overdraft

I have swapped out my Cup 2 for Michelin PS4 on my GT3T and it was the absolutely the right thing for street driving. I am not tracking my car so can’t speak to that…but for your climate and daily driving, I can’t help but think you’d be very happy with the switch.

ParadiseGT3

You've been hovering just a few degrees above trouble. Summer compounds are ok (not at their best) in the 40's in American money. Drop down into the 30's, approach freezing, and the combination of Cup 2 compound and potentially frozen roadways would be problematic. You don't want to go searching for that glass transition temperature in dry conditions, let alone wet.

But yes, the "Cup 2's are death in the rain" concept is overblown. Most specifications like N spec do just fine. This misconception is rooted in earlier Cup tires that were more like slicks. There are some other current specs that are less wet weather capable as well.

Angelus666

Thanks for the replies. Yep, I had a M3 CSL from 2006 to 2009 and on the original Cups they were extremely tricky in the cold and wet. I've got a set of PS4s in the garage, so maybe I'll just go and get these changed to feel the diference. To be fair I had them on my 981 BGTS before I had the RS and they were brilliant road tyres for a car with 350 bhp.

ParadiseGT3

CSL, nice! You'll net gains in wet traction & comfort with PS4S. And probably better maintained performance at the lower end of the temp range, but still not a limitation you want to go looking for.

Downside will be a loss of sharpness/directness that's even perceptible on the street, but that may not be a priority based upon use description. I've retired a couple of track cars, swapped their track-focused tires for PS4S and PSS and found it worth the exchange for street only purposes.

Parhelion

Fellow Brit here and PS4S are *superb* on these cars for about 90% of the time on UK roads. Swapped mine after a puncture (and difficulty finding a rear Cup2!) and couldn't be happier. Chris Harris rates them v highly too.

Depending on spring/summer track time later this year I might stick Cup2s back on (or look for separate track wheels and maybe Nankang AR-1s) but for UK mostly road use I think they're the best option out there.

rcg412

Rain is fine. Cold weather SUCKS. <42 I find very slippery ...

alidonkaka

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According to what I've heard, the new Porsche Cup 2s were designed to be more everyday useable.

Seth Thomas

Nice, I always wanted to try to import a CSL!

Yes the original Cup tires were **** in the rain. They were a tire you never wanted to get caught out in the rain as they had no grip at all or any channels for guiding water from under the tire. They would hydroplane while driving straight even with the slightest water on the road.

Christian Plyler

Blah blah blah glass transition yada yada yada. Yeah, they become harder, but they're still just hard rubber. They don't literally turn into actual glass. And we've got a lot of rubber on the asphalt with these cars, so even when they're ice cold there is still more grip than grandma's Corola or something like that. Don't try to get all crazy teenager, but for just regular cruising around on public streets they're perfectly adequate. It's not like you're going to go flying into the ditch just pulling out of your driveway.

atlrvr

It's been high 20's to low 30's here most mornings since mid-December and I had Cups 2's on my Touring and was exhausting to drive (I commute 15 miles on interstate with limited traffic). I switched to PS4S just last week and can't believe I didn't do it last year.

tqevo

Avoid snow, go slow and you should be good to go