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Current options for trackable tires for 991 GT3?

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Old 07-11-2022, 10:53 PM
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Manifold
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Originally Posted by joerg65
Have you tried Cup2 Connect tyres? I’m not using the “connect” sensor stuff but the tyre compound is at least as grippy and seems to be lasting longer than the standard Cup2.
Haven’t tried them, I didn’t know anything about them. Do we have solid data on their lap times and durability?

Is the Cup 2R out of the question, based on high cost and low durability?
Old 07-12-2022, 02:45 PM
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ParadiseGT3
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Originally Posted by Manifold
Haven’t tried them, I didn’t know anything about them. Do we have solid data on their lap times and durability?

Is the Cup 2R out of the question, based on high cost and low durability?
Skip the connects. Just your usual Cup 2 under a different name with some tech you probably won't use.

If you're getting up to 10 days out of a set of N spec Cup 2, then the R's might be worth it for you. You'll run through the R's skim coating after a couple of days at that wear rate, but then they're essentially reduced to standard Cup 2 pace. If you go into them with this understanding then the R's don't seem like too crazy of a deal. You're paying an extra $600-700 (whatever current difference is) for some hero sessions then you return to normal.

Got 6 days out of Nankang AR-1's. Great track focused tire, durable, but compromised on street, very limited in wet. So with rainy season underway CR-S are next for me https://philstireservice.com/shop/nankang-cr-s/. Word is they're as fast or nearly as fast as AR-1's but much better as far as comfort and wet performance. We'll see.

Supercar 3 is a great tire, suitable for moderate track pace.
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Old 07-13-2022, 11:14 AM
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Cup 2 sports or cup 2 R ARE GREAT TIRES
Old 07-16-2022, 04:06 PM
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erko1905
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No fitment issues with the AR-1.
Old 07-17-2022, 10:44 AM
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Jim Cobb
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Originally Posted by vernontwg
10 Days on cup2s is insanely good to begin with. They already loose peak grip after about 4 days from my experience.
Four days is the max I have ever gotten with them. Treadwear is my problem.
Old 07-17-2022, 10:56 AM
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Originally Posted by AdamSanta85
Supercar 3R would be comparable to Cup 2. The Supercar 3 is slower than Cup 2.
I have heard good things about the Supercar 3. I am thinking of trying them on my 981 GT4. I have heard they were almost designed for the ZL Camaro. I can accept their being slower than the Cup 2’s. My question is how much slower or less grippy? If anyone has tried them on a GT4, I would love to hear from you especially. Thanks.
Old 07-17-2022, 05:11 PM
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Manifold
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Any love for Sport Maxx Race 2?

BTW, we'e comparing tire life based on track days, but sessions is probably more accurate. I estimate that I get 25-30 sessions out of the Cup 2.
Old 07-17-2022, 08:15 PM
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lisocayman
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That’s pretty long. I get 16 sessions on cup2 and then they aired corded.
Old 07-17-2022, 09:00 PM
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ParadiseGT3
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Originally Posted by Manifold
Any love for Sport Maxx Race 2?

BTW, we'e comparing tire life based on track days, but sessions is probably more accurate. I estimate that I get 25-30 sessions out of the Cup 2.
Yes, the better of the two OE tires in my experience. Faster and more longevity than the Cup 2's. But $1,000 more than the Nankang options and like $240/set shy of Cup 2 R right now (in OE sizing), which is ridiculous.
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Old 07-17-2022, 09:12 PM
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Originally Posted by Jim Cobb
I have heard good things about the Supercar 3. I am thinking of trying them on my 981 GT4. I have heard they were almost designed for the ZL Camaro. I can accept their being slower than the Cup 2’s. My question is how much slower or less grippy? If anyone has tried them on a GT4, I would love to hear from you especially. Thanks.
The Supercar 3R was developed as the OE tire for the ZL1 1LE. Bears a lot of resemblance to the Trofeo R, which was the OE tire for the previous generation Z/28. Except Goodyear did an exceptional job, the 3R is a much better tire. And it's faster than Cup 2, no question.

Supercar 3 was/is the OE for the SS 1LE. Results vary, but it's not far off of Pilot Sport Cup 2 on some platforms. Relevant test: https://grassrootsmotorsports.com/ar...ear-tire-test/
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Old 07-17-2022, 09:45 PM
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85Gold
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Falken RT660 and Khumo V730 are both faster than the SC3 and on par with the Cup 2. Both the RT660 and V730 benefit from heat cycling.

Peter
Old 07-17-2022, 10:06 PM
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Originally Posted by ParadiseGT3
The Supercar 3R was developed as the OE tire for the ZL1 1LE. Bears a lot of resemblance to the Trofeo R, which was the OE tire for the previous generation Z/28. Except Goodyear did an exceptional job, the 3R is a much better tire. And it's faster than Cup 2, no question.

Supercar 3 was/is the OE for the SS 1LE. Results vary, but it's not far off of Pilot Sport Cup 2 on some platforms. Relevant test: https://grassrootsmotorsports.com/ar...ear-tire-test/
Many thanks for sharing this.
Old 07-17-2022, 10:11 PM
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Originally Posted by 85Gold
Falken RT660 and Khumo V730 are both faster than the SC3 and on par with the Cup 2. Both the RT660 and V730 benefit from heat cycling.

Peter
Wish alternative manufacturers would offer GT3 sizing, but seems like a no fly zone. We've got next to no options. Nankang the only one so far.
Old 07-17-2022, 10:21 PM
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Originally Posted by Manifold
Any love for Sport Maxx Race 2?

BTW, we'e comparing tire life based on track days, but sessions is probably more accurate. I estimate that I get 25-30 sessions out of the Cup 2.
I really like my Sport Maxx Race 2 tires. I bought them for the street and are very engaging.
Old 07-17-2022, 11:23 PM
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85Gold
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Originally Posted by ParadiseGT3
Wish alternative manufacturers would offer GT3 sizing, but seems like a no fly zone. We've got next to no options. Nankang the only one so far.
I thought you could run 19's on the steel brake 991 GT3 which allows the Falken and Khumo 245/305 19.


The new Bridgestone RE71RS has good sizes in Japan but the initial batch of sizes that TR received doesn't have any large 19 or 20's

Peter

Last edited by 85Gold; 07-17-2022 at 11:32 PM.


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