2012 991.1 S feels squirmy after new rear tires
#1
2012 991.1 S feels squirmy after new rear tires
I got a flat on one of my rears and it was unrepairable. I had to get it towed to the tire shop and since the rears had about 30% left I got both replaced. It feels very active now in the back like the tires have a squirmy feel, kind of almost an oversteer feeling in the back or floating around a bit. It's kind of sketching me out at higher speeds. The PSI is set at 48. Any ideas? I recall getting some new rears on a dually ford work truck and it had the same feeling like the back was floating around on me.
Last edited by ejlif; 11-02-2021 at 09:55 PM. Reason: spelling
#2
Three Wheelin'
48 psi….. yikes. What psi did you have in the old set? I run 34 front 37 rear with car gauge set to comfort partial load.
Last edited by Al.Fresco; 11-03-2021 at 09:02 PM.
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maschinetheist (11-03-2021)
#3
#4
Nordschleife Master
New tires have a film on them. You need to drive cautiously until the film wears off. My new Michelins did the same thing when first mounted.
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manifold danger (11-03-2021),
mc3456 (11-03-2021)
#6
Every time I leave a tire shop or dealer I find my tires inflated to max pressure or close to it.
As others said that pressure is too high, particularly if those are cold readings. Make sure you’ve got the recommended pressures.
991.2 Carrera S comfort pressure 29/33 partial load is what I run, feels like a good balance.
As others said that pressure is too high, particularly if those are cold readings. Make sure you’ve got the recommended pressures.
991.2 Carrera S comfort pressure 29/33 partial load is what I run, feels like a good balance.
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ducktails (11-19-2021),
maschinetheist (11-03-2021)
#7
RL Community Team
Rennlist Member
Rennlist Member
+1 on the "holy crap that's high pressure"
drop those tire pressures and things will feel a lot better, especially if you're in the USA where it's getting colder.
drop those tire pressures and things will feel a lot better, especially if you're in the USA where it's getting colder.
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maschinetheist (11-03-2021)
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#8
What tire and size did you go with?
Had the exact same experience when I purchased new rear tires only. I was running the Conti extreme sports, and they seemed great...until I only replaced the rears, with the exact same tire (non spec). The stability control would come on when spirited driving on off ramps, or when not under acceleration. .Needless to say, the rears finally began to behave much better after over half of the tread was worn, although I can still get the stability control to come on...which is bs...but whatever...
Fast forward a year later and hours of tire research...I just ordered a set of Michelin PS4S N0 spec. Although there is much skepticism regarding the N0 spec tires vs standard PS4S, the N0 (or 1, or whatever) are what the Porsche engineers laid out for Michelin to spec to the 991.1 vehicle, and those tires are indeed different than a non spec standard PS4S, the tire compound is different across the face of the tire as well as subtle differences within the tread pattern...
I am anticipating a much more precise feel to the road and no bs tail wagging or stability control warnings...
Had the exact same experience when I purchased new rear tires only. I was running the Conti extreme sports, and they seemed great...until I only replaced the rears, with the exact same tire (non spec). The stability control would come on when spirited driving on off ramps, or when not under acceleration. .Needless to say, the rears finally began to behave much better after over half of the tread was worn, although I can still get the stability control to come on...which is bs...but whatever...
Fast forward a year later and hours of tire research...I just ordered a set of Michelin PS4S N0 spec. Although there is much skepticism regarding the N0 spec tires vs standard PS4S, the N0 (or 1, or whatever) are what the Porsche engineers laid out for Michelin to spec to the 991.1 vehicle, and those tires are indeed different than a non spec standard PS4S, the tire compound is different across the face of the tire as well as subtle differences within the tread pattern...
I am anticipating a much more precise feel to the road and no bs tail wagging or stability control warnings...
The following users liked this post:
GT3FZS (11-03-2021)
#10
What tire and size did you go with?
Had the exact same experience when I purchased new rear tires only. I was running the Conti extreme sports, and they seemed great...until I only replaced the rears, with the exact same tire (non spec). The stability control would come on when spirited driving on off ramps, or when not under acceleration. .Needless to say, the rears finally began to behave much better after over half of the tread was worn, although I can still get the stability control to come on...which is bs...but whatever...
Fast forward a year later and hours of tire research...I just ordered a set of Michelin PS4S N0 spec. Although there is much skepticism regarding the N0 spec tires vs standard PS4S, the N0 (or 1, or whatever) are what the Porsche engineers laid out for Michelin to spec to the 991.1 vehicle, and those tires are indeed different than a non spec standard PS4S, the tire compound is different across the face of the tire as well as subtle differences within the tread pattern...
I am anticipating a much more precise feel to the road and no bs tail wagging or stability control warnings...
Had the exact same experience when I purchased new rear tires only. I was running the Conti extreme sports, and they seemed great...until I only replaced the rears, with the exact same tire (non spec). The stability control would come on when spirited driving on off ramps, or when not under acceleration. .Needless to say, the rears finally began to behave much better after over half of the tread was worn, although I can still get the stability control to come on...which is bs...but whatever...
Fast forward a year later and hours of tire research...I just ordered a set of Michelin PS4S N0 spec. Although there is much skepticism regarding the N0 spec tires vs standard PS4S, the N0 (or 1, or whatever) are what the Porsche engineers laid out for Michelin to spec to the 991.1 vehicle, and those tires are indeed different than a non spec standard PS4S, the tire compound is different across the face of the tire as well as subtle differences within the tread pattern...
I am anticipating a much more precise feel to the road and no bs tail wagging or stability control warnings...
N spec is a huge deal.
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nstar8 (11-03-2021)
#12
Three Wheelin'
Tire Rack will tell you that all tires require a break in for 500 miles- https://www.tirerack.com/tires/tiret....jsp?techid=5&
#13
Rennlist Member
And it will go away in a few miles. I took mine on about a 60 mile twisty back road journey after replacing and they were fine when I got home.
BTW lower that pressure.
#14
RL Community Team
Rennlist Member
Rennlist Member
The Rennlist brain trust has provided excellent information and recommendations:
1-outer coating needs to wear off with regular driving.
2-psi. Much too high. In the MFD go to the tire pressure screen and scroll and choose either winter or summer and 19” or 20” and full load or partial. That will tell you what to set to. You can use that screen to lower pressures until you are at a zero difference from the goal psi. If this doesn’t make sense, then read up a bit and learn to use it. It’s helpful when driving around.
1-outer coating needs to wear off with regular driving.
2-psi. Much too high. In the MFD go to the tire pressure screen and scroll and choose either winter or summer and 19” or 20” and full load or partial. That will tell you what to set to. You can use that screen to lower pressures until you are at a zero difference from the goal psi. If this doesn’t make sense, then read up a bit and learn to use it. It’s helpful when driving around.
#15
RL Community Team
Rennlist Member
Rennlist Member
The idea that mold release compound corrupts the outer 1/32" of tire or something is a thing of the past (if it ever was a thing, I'm too young for these myths). Driving your car from where you got the tires mounted+balanced to home is enough to scrub in new street tires.
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GT3FZS (11-03-2021)