Bridgestone Potenza RE980AS
#302
Rennlist Member
Yes, have them on the rear of a 991.2 Targa GTS. (5 Lug Bolt Rims)
They handle great and ride good. They are Michelin's ZP, version of a run flat. So far I like them.
They handle great and ride good. They are Michelin's ZP, version of a run flat. So far I like them.
Last edited by 981KMAN; 04-16-2021 at 11:07 AM. Reason: Added Rim Info
#303
Rennlist Member
#304
Rennlist Member
The adage of "not mixing tires types" applies to using two different tire brands or tire families with-in brand with different MFG technology and performance characteristics, and pushing the tires to handling limits. As soon as you put an All Season tire on your car you knowingly, or should know, that you no longer have the maximum performance that Porsche designed into the vehicle. In other words, don't track you car on all season tires. Yet for street use and backroad twisties, where you need and use less than the maximum, they are perfectly fine, and my experience supports this.
My Michelin contacts (we have multiple Michelin engineers in our local PCA Region, as it includes the Michelin USA Headquarters), tell me that the Pilot Sport All Season 4 tire line will add the 245/35 size this summer, so when I need the front tires replaced, I expect they will be available by then. If not, I will use the 255/35R20 size and have ZP tires all around.
I also suggest that you check your tire size comparison dimensions as the 255/35R20 tire is not "1.2" taller" as you state. It is only ~0.2+" taller that the OEM size of 245/35R20.
Best wishes for your tire choice.
Last edited by 981KMAN; 04-16-2021 at 11:54 AM.
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ICU991812 (04-16-2021)
#305
Rennlist Member
I still wouldn't use 2 different tread designs, but that's just me. The numbers I came up with were from the Michelin website. There are different specs within a tire size. Ex AO (Audi), K1,K2, K3 (Ferrari) , NO being Porsche spec. I originally looked at the AO which list a diam. of 25.82 which I think is a misprint. After looking at your chart I went back and looked at the NO version and that is listed as 26.82 diam. Thanks for your reply.
#306
Rennlist Member
How are the roads in your area? The 911's suspension is not tuned to accommodate run flats (like the C8) and I find the ride tolerable with Michelin Pilot sport 4s. Fractured and potholed roads where I live in NH. I shudder at the thought of using run flats.
#307
Rennlist Member
I am actually surprised that they ride the same as the OEM tires, since I have had bad experiences with Run Flat Pirelli tires on my Cayman. Yet these Michelin PSAS4 (ZP) tires ride surprisingly well. Our road quality is not that good as our DOT has neglected our road maintenance due to budget cutbacks over the past few years.
#308
Just put on a set of Bridgestone RE980AS on my 14 C4S.
The summer ride quality is already superior when compared to the OEM P-zeros. Looking forward to some wet conditions to test them out.
They definitely do have a stretch looked at the 305 size versus the original tires. Probably could've +1 the sizing.
The summer ride quality is already superior when compared to the OEM P-zeros. Looking forward to some wet conditions to test them out.
They definitely do have a stretch looked at the 305 size versus the original tires. Probably could've +1 the sizing.
#310
Racer
RF's can be repaired. I've had two of them plugged (properly). The puncture has to be with the tread and no closer to the edge than about an inch. Some manu's don't want you to fix them and just buy new tries...not necessary most of the time.
#312
Pro
Are these tires considered run flats?
#314
Pro
Exactly - not sure what this has to to do with this thread...
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BGLeduc (06-29-2021)