991 tires....
#31
03-28-2013, 12:09 AM
Resurrecting this thread because, after almost a year of happy cornering, my OEM P-Zeroes are pretty threadbare, in particular the rears.
Attached is TireRack's comparison of the Michelin PSS, Pirelli P-Zero (non-N) and P-Zero N. (Data where only one tire differs are marked yellow and data where all three tires differ are marked green for easier parsing.)
Assuming the data TireRack gives for the tires isn't totally off, four things jump out at me right away:
Attached is TireRack's comparison of the Michelin PSS, Pirelli P-Zero (non-N) and P-Zero N. (Data where only one tire differs are marked yellow and data where all three tires differ are marked green for easier parsing.)
Assuming the data TireRack gives for the tires isn't totally off, four things jump out at me right away:
- Their Customer survey ratings are much higher for the PSS.
- The PSS is designed for less thread wear (300 vs 220). Assuming thread wear is roughly proportional to grip, this means less grip for the PSS.
- The non-N and N-spec P-Zeros actually differ significantly. In particular, the non-N-spec P-Zero has a much higher front load rating and weighs more in front and less in the back. Section and thread widths differ throughout.
- There is no significant difference in price for a set of non-N-spec ($1,602) and N-spec ($1,640) P-Zeros.
http://www.tirerack.com/tires/tires....XLV2&tab=Specs
#32
03-28-2013, 01:03 AM
Not sure what you mean by specs. Go to tirerack.com and enter your car's specification and the tire choices along with all specs will appear.
The Pilot Super Sports are slightly higher load rating in the front than the Pirellis 94 vs. 91. They could be marginally heavier, but that's not certain.
What is certain is that they are less expensive!
Also, there's link on the tirerack, or perhaps its on pca.org - so that once you are within the PCA tirerack site, a portion of your purchase gets donated to the PCA. At least that was the case in 2011. Worth checking into.
Regards,
DRP
The Pilot Super Sports are slightly higher load rating in the front than the Pirellis 94 vs. 91. They could be marginally heavier, but that's not certain.
What is certain is that they are less expensive!
Also, there's link on the tirerack, or perhaps its on pca.org - so that once you are within the PCA tirerack site, a portion of your purchase gets donated to the PCA. At least that was the case in 2011. Worth checking into.
Regards,
DRP
#33
03-28-2013, 10:08 AM
But On tirerack, it seems the only suggestion for the 2S and 4S is pirellis..
seems like there is no size for us on the michelins..
seems like there is no size for us on the michelins..
The 991 (aside from the base car with 19s) seemingly only comes on Pirelli Pzeros - regardless of which country you're in, the engine size, suspension or any other spec.
This begs an interesting question - How will it feel on Pilot Super Sports? (b/c you can damn sure bet those will be the first set of replacements on my car)
I'm not a race car driver, but I have experienced the impact of switching tires on performance road cars. You can really alter stability, turn in response, grip and general steering effort just by changing types of tires.
I'm a huge Michelin fan. Although these Pirellis grip like glue once your in a steady state mid corner, they don't strike me as a particularly sophisticated tire? Tire rack effectively rates the PSS above the Pzero in every category. I'd love to hear from a 991 owner once they go to Michelins. I wouldn't be surprised if the french rubber restores a bit more feeling to the new steering.
P.S. anyone notice there is no curb guard on the rear pirellis? The side wall is totally convex - a bit odd.
Regards,
DRP
This begs an interesting question - How will it feel on Pilot Super Sports? (b/c you can damn sure bet those will be the first set of replacements on my car)
I'm not a race car driver, but I have experienced the impact of switching tires on performance road cars. You can really alter stability, turn in response, grip and general steering effort just by changing types of tires.
I'm a huge Michelin fan. Although these Pirellis grip like glue once your in a steady state mid corner, they don't strike me as a particularly sophisticated tire? Tire rack effectively rates the PSS above the Pzero in every category. I'd love to hear from a 991 owner once they go to Michelins. I wouldn't be surprised if the french rubber restores a bit more feeling to the new steering.
P.S. anyone notice there is no curb guard on the rear pirellis? The side wall is totally convex - a bit odd.
Regards,
DRP
#34
03-28-2013, 10:32 AM
Since the GT3 is getting Dunlop Sport Maxx Race, I'm hoping they will release those in 20's. My guess would be they would outperform the MSS.
#35
03-28-2013, 01:03 PM
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Not sure I understand. The image I posted shows the MPSS for 20" C2S models in 240/295 size.
#36
03-28-2013, 04:05 PM
Resurrecting this thread because, after almost a year of happy cornering, my OEM P-Zeroes are pretty threadbare, in particular the rears.
Attached is TireRack's comparison of the Michelin PSS, Pirelli P-Zero (non-N) and P-Zero N. (Data where only one tire differs are marked yellow and data where all three tires differ are marked green for easier parsing.)
Assuming the data TireRack gives for the tires isn't totally off, four things jump out at me right away:
Seeing that both the PSS and non-N P-Zero are sold for many vehicles, not just the 911, doesn't this support the N-spec-leaning camp? In particular, there doesn't seem to be an "N-spec markup", it seems P-Zeros are just more expensive.
Attached is TireRack's comparison of the Michelin PSS, Pirelli P-Zero (non-N) and P-Zero N. (Data where only one tire differs are marked yellow and data where all three tires differ are marked green for easier parsing.)
Assuming the data TireRack gives for the tires isn't totally off, four things jump out at me right away:
- Their Customer survey ratings are much higher for the PSS.
- The PSS is designed for less thread wear (300 vs 220). Assuming thread wear is roughly proportional to grip, this means less grip for the PSS.
- The non-N and N-spec P-Zeros actually differ significantly. In particular, the non-N-spec P-Zero has a much higher front load rating and weighs more in front and less in the back. Section and thread widths differ throughout.
- There is no significant difference in price for a set of non-N-spec ($1,602) and N-spec ($1,640) P-Zeros.
Seeing that both the PSS and non-N P-Zero are sold for many vehicles, not just the 911, doesn't this support the N-spec-leaning camp? In particular, there doesn't seem to be an "N-spec markup", it seems P-Zeros are just more expensive.
Your timing on this question today was perfect because I was bad mouthing my P-Zeros this morning at dawn while heading off to the office. Hoping to change over to Pilots again soon.
As far as tread wear is concerned, there are just two many variables in each of our drivings styles to say one way or the other which tire is really better for tread wear. I guess.
#37
03-29-2013, 12:04 PM
Join Date: Aug 2009
Location: connecticut
Posts: 580
Rep Power: 50
tread wear...
[*]The PSS is designed for less thread wear (300 vs 220). Assuming thread wear is roughly proportional to grip, this means less grip for the PSS.[*]The non-N and N-spec P-Zeros actually differ significantly. In particular, the non-N-spec P-Zero has a much higher front load rating and weighs more in front and less in the back. Section and thread widths differ throughout.
Last thing. They now offer a 91Y load rating front PSS which matches the OEM tire.
I will be getting the Michelins...
DRP
#38
03-29-2013, 12:08 PM
Join Date: Aug 2009
Location: connecticut
Posts: 580
Rep Power: 50
front vs. rear wear for the 991?
Can anyone who needs new rear tires on their 991 comment on the condition of their fronts?
Given the new wheelbase and other changes, the fronts seem to be shouldering more of the load than on my last 997. All other things being equal, this should lead to more front tire wear. It used to be 2 rears for every front set. Do the fronts need replacing along with the rears now for the new car (I'monly at 9000 miles - 2 of which were on winter tires)?
Happy easter,
DRP
Given the new wheelbase and other changes, the fronts seem to be shouldering more of the load than on my last 997. All other things being equal, this should lead to more front tire wear. It used to be 2 rears for every front set. Do the fronts need replacing along with the rears now for the new car (I'monly at 9000 miles - 2 of which were on winter tires)?
Happy easter,
DRP
#39
03-29-2013, 12:41 PM
PDCC or none?
Just had 10k service done. I have the same wear on all four tires, i.e., 5mm of tread left. I have PDCC and P-Zeros.
Just had 10k service done. I have the same wear on all four tires, i.e., 5mm of tread left. I have PDCC and P-Zeros.
Last edited by VikingMariner; 03-29-2013 at 12:46 PM.
#41
04-02-2013, 01:32 PM
Has anyone tried the P Zero Corsas on the 991? They're the only street-able semi-R I could find in the 20" sizes.
#43
04-03-2013, 09:13 PM
mix and match?
probably a dopey question, but anything wrong with putting paired michelin pss's on the rears and leave the front pzero's on when replacement needed for rears only? 
#44
04-03-2013, 10:52 PM
I'm not 100% sure what the technical reason is, but I've always read that all 4 have to be the same kind of tires. Probably for handling consistency, but I'm not sure there's much of an effect if any for a regular road car. I sure as heck see lots of beaters out there running mismatched tires, not to mention doughnut spares.
#45
04-04-2013, 03:11 AM
It won't be a problem unless you're pushing the car to it's limit e.g. tracking. Only mix tires of the same performance type though.