Temperature operating window for P-Zeroes?

[Skd884]

What's the dot date on the tyres?

How much tread?

 

[KennyN]

I have P Zeros on the Porker :

Fronts - 285 / 35 / 22 with 3mm remaining
Rears - 315 / 30 22 with 5.5mm remaining

Never had any issues with the vehicle feeling anything else but planted or feeling skittish , and that is when the temp has been < 5 degrees up here for the last six months. The only slightly embarrassing issue is with the "crabbing" noises you get due to their sizes and the cold weather.

Mine will be getting replaced over the next couple of months and would fit them again , if i can get them for a sensible price , if i change brands it wont be due to their shortcomings.

K

 

[st13phil]

I have P Zeros on the Porker :

Fronts - 285 / 35 / 22 with 3mm remaining
Rears - 315 / 30 22 with 5.5mm remaining

Never had any issues with the vehicle feeling anything else but planted or feeling skittish

It’s worth remembering that the P Zeros come in many different “flavours”, so I do wonder if the poor experience so many have with them on E63’s is down to the MO variant, while the positive experience on the Porker is down to the N variant?

 

[KennyN]

It’s worth remembering that the P Zeros come in many different “flavours”, so I do wonder if the poor experience so many have with them on E63’s is down to the MO variant, while the positive experience on the Porker is down to the N variant?

Possibly , but would there really be as much of a difference between planted and dangerous with the same brand especially if the Merc has MO tyres designed for that particular marque ?

K

 

[st13phil]

Possibly , but would there really be as much of a difference between planted and dangerous with the same brand especially if the Merc has MO tyres designed for that particular marque ?

I can't speak to the difference(s) between the variants, but I can - by personal experience - testify as to how catastrophically bad the tyre is on an E63 when part worn and in cooler conditions, especially when there's even a hint of dampness.

Both ContiSport 5P's in MO spec and Goodyear Eagle F1 Asymmetric 3's in generic spec were massively superior to the P Zeros in those conditions on my E63's.

 

[sgregory124]

What's the dot date on the tyres?

How much tread?

About 5.5mm all round, rear two tyres are DOT 0522 and the front are xx21 (one week 46, the other 07 I believe).

 

[Bobby Dazzler]

About 5.5mm all round, rear two tyres are DOT 0522 and the front are xx21 (one week 46, the other 07 I believe).

Are they MO spec, or something else?

 

[Bobby Dazzler]

Possibly , but would there really be as much of a difference between planted and dangerous with the same brand especially if the Merc has MO tyres designed for that particular marque ?

K

Back in 2017 I visited the Pirelli Performance Centre at Pirelli HQ, and I asked how much of a difference there really is between the manufacturer homologated tyres, and to my surprise they guy I was talking to was able to show me.

He had a board with four cross sections cut from the same size tyre, 305/30 20 I think, but which had been homologated for the specific requirements of four different manufacturers - I think he said Lamborghini, Ferrari, Audi and a fourth.

Sure enough, you could see the differences, with different combinations of: bead shape and size (square or circular); width and depth of chorded section across the width of the tyre; shoulder profile; rim protection, etc. Fascinating.

I wish I took some photos now, including our old (N0 Porsche) and new tyres (MO Mecrcedes) side by side: the shoulder profile was different in shape, and the MO tyres have a rim protector (N0 didn't), and that's just the difference visible from the outside.

The guy explained that Porsche are not only very strict in the event of a warranty claim if the wrong tyre are fitted, he said unless exactly the right tyre is fitted some Porsches wear the shoulder very quickly because the geometry set up requires the right shoulder profile.

Fascinating! Or at least I thought it was

 

[KennyN]

The guy explained that Porsche are not only very strict in the event of a warranty claim if the wrong tyre are fitted, he said unless exactly the right tyre is fitted some Porsches wear the shoulder very quickly because the geometry set up requires the right shoulder profile.

Fascinating! Or at least I thought it was

This is a consideration when replacing the P Zero`s , last thing anyone needs is an issue with a warranty claim should tyre choice play a part in refusal of a ,drive-train, claim.

I will probably go with new Zero`s , regardless of cost.

The only other approved rubber is Yokohama but my OCD wouldn`t let me have different tyres on the front so new rear Yoko`s would also be needed.

K

 

[sgregory124]

Are they MO spec, or something else?

Not MO spec, just standard P-Zeroes as far as I can tell.

 

[Mactech]

This is a consideration when replacing the P Zero`s , last thing anyone needs is an issue with a warranty claim should tyre choice play a part in refusal of a ,drive-train, claim.

I will probably go with new Zero`s , regardless of cost.

The only other approved rubber is Yokohama but my OCD wouldn`t let me have different tyres on the front so new rear Yoko`s would also be needed.

K

I’m with Kenny on this one. My Macan was fitted with brand new P Zero’s 10k miles ago when I bought it. Whilst Pirelli are not my favourite brand ( mirrored by my experience in motorsport) they have been very much ‘fit for purpose’. Generally the car sticks like limpet on superglue in all conditions. Yes, there is less grip at lower temperatures, but certainly no step change at a given temp. With just 2mm wear in 10k miles, I’m not in a rush to change them out for a while yet. So the NO designation for Porsche, gets a big YES from me.

 

[Bobby Dazzler]

Not MO spec, just standard P-Zeroes as far as I can tell.

That may be exaggerating some negative traits.

Mrs D and I have matching his & hers cars which are fundamentally the same, and run identically sized wheels and tyres. We have covered more than 200,000 miles and experimented with MO (Mercedes), N0 (Porsche) and AO (Audi) Pirelli PZero tyres, as well as run Continentals and the much celebrated Michelin Pilot Sport 4 S.

AO last (much) more than twice as long as MO but the AO are a little stiffer, suffer (much) more with tram lining, makes the front end slightly sharper, and surprisingly they communicate more about the road surface, but make the steering a little busy. MO PZero are a better match for the dynamics of the car, as they dial out some of that stiffness, and winter tyres dial out a touch more.

 

[Bobby Dazzler]

This is a consideration when replacing the P Zero`s , last thing anyone needs is an issue with a warranty claim should tyre choice play a part in refusal of a ,drive-train, claim.

I will probably go with new Zero`s , regardless of cost.

The only other approved rubber is Yokohama but my OCD wouldn`t let me have different tyres on the front so new rear Yoko`s would also be needed.

K

I’d do the same.

 

[Jobsworth]

My C63 had a pair of brand new P Zeros put on the front the day before I bought it. I put up with them for almost six months before I just had to take them off. Michelin PS4S replaced them. Night and day. Very, very dark night, lovely sunny day.

 

[ALFAitalia]

This is a consideration when replacing the P Zero`s , last thing anyone needs is an issue with a warranty claim should tyre choice play a part in refusal of a ,drive-train, claim.

I will probably go with new Zero`s , regardless of cost.

The only other approved rubber is Yokohama but my OCD wouldn`t let me have different tyres on the front so new rear Yoko`s would also be needed.

K

Is like to know what possible warranty claim they could legally refuse because you had non approved tyres on. The tyres would have to have a direct affect on the claim or they would have no choice but to pay.... and I'm not sure I can think of anything. Sounds unlikely to me..... like people who say Mercedes won't pay out a warranty claim without all Merc main dealer servicing.. which is also nonsense and illegal. There are manufacturers rules.....but they are trumped by the law of the land.

 

[KennyN]

Is like to know what possible warranty claim they could legally refuse because you had non approved tyres on. The tyres would have to have a direct affect on the claim or they would have no choice but to pay.... and I'm not sure I can think of anything.

Porsche had (have) an issue with their transfer cases leaving the out of warranty owners with a hefty £4k ish repair bill , all they have to say is that non Porsche rated tyres contributed in some way to the issue ,due to some weird logic, as a warranty get out clause.

Do i think a set of non N1/ N1 rated rubber will knacker a transfer case , no - but could i prove it , no.

For the sake of an extra £200 for a set of front tyres i will stick with the P Zeros to keep everything in order. Plus doing around 2k miles a year i will never need to replace them in my ownership.

In a similar vein ,it is also due an oil change next month and i am using a genuine oil filter , could save myself 50% buying a Bosch etc. which will do the job as well as an OEM but not worth the potential grief should an engine warranty claim be made.

K

 

[Bobby Dazzler]

For the sake of an extra £200 for a set of front tyres i will stick with the P Zeros to keep everything in order.

I’m surprised there’s so much difference. It’s been a few years since I bought N rated tyres, but each time I did the price was much the same as others in the same size and speed rating.

 

[KennyN]

I’m surprised there’s so much difference. It’s been a few years since I bought N rated tyres, but each time I did the price was much the same as others in the same size and speed rating.

The P Zeros are £370 each , Yokohama / Falken / Hankook etc are around the £250 mark.

They are available from £87 for Acellera -> £392 MPS4

K

 

[SpikyMikey]

Porsche had (have) an issue with their transfer cases leaving the out of warranty owners with a hefty £4k ish repair bill , all they have to say is that non Porsche rated tyres contributed in some way to the issue ,due to some weird logic, as a warranty get out clause.

Do i think a set of non N1/ N1 rated rubber will knacker a transfer case , no - but could i prove it , no.

For the sake of an extra £200 for a set of front tyres i will stick with the P Zeros to keep everything in order. Plus doing around 2k miles a year i will never need to replace them in my ownership.

In a similar vein ,it is also due an oil change next month and i am using a genuine oil filter , could save myself 50% buying a Bosch etc. which will do the job as well as an OEM but not worth the potential grief should an engine warranty claim be made.

K

Rumours has it BMW are similar with their XDrive cars stating Star marked tyres should be used.

 

[KennyN]

Rumours has it BMW are similar with their XDrive cars stating Star marked tyres should be used.

I know with most manufacturers there is a minimum tolerance between F+R tyre depth as the transfer case has trouble dealing with anything over a certain discrepancy , possibly leading to premature TC failure ??

K