Warranty after changing to Michelin PSS4

[shanov2]

Hi All,

Just wondering if anyone has had experience with warranty claims after changing tires to anything but the OEM Pzero?

Car is 2016 RS3 with 24,000Kms. Have had the tires on for about 3-4000kms.

Haldex pump was replaced a few thousand Kms ago and the dull vibration went away for a while but now service has discovered some metal in the diff oil.

Should I switch back to the Pzero?

Thanks

[Alister]

Your choice of tyres should have no bearing on the vehicle warranty, especially if they’re finding swarf in the diff oil.

[jaydece]

They would need to prove that the tires “is/was” the cause of the failure in the first place...

Did you stick to like for like tire profile as per oem is the next question?


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[shanov2]

Yeah that was my thought as well. Im being told they need to be an Audi approved model. Is this designated on the Pirelli as AO?

I have 255/30 R19 91Y on the front and 235/35 R19 91Y on the rear which is the same as the previous (oem) p zero setup.

They are still fairly new so don't want to be pushed to buy new tyres before I go ahead with warranty work.

[Remarcabull]

Yeah that was my thought as well. Im being told they need to be an Audi approved model. Is this designated on the Pirelli as AO?

I have 255/30 R19 91Y on the front and 235/35 R19 91Y on the rear which is the same as the previous (oem) p zero setup.

They are still fairly new so don't want to be pushed to buy new tyres before I go ahead with warranty work.

Hey, they will void you. It's happened recently. The size might say it's 255/30 But actually the pzeros are specially made to match the rolling diameter of the 235/35 rears and therefore not true 255/30 tyres. If you don't want issues do what the whole community is doing and go 245/35 mps4s. They fit on 8 and 8.5 inch rims and keep the same rolling diameter. They cant dispute that.

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[Dingah]

I'd ago so far as to say something like rubbish.
A 255/30/R19 has a given circumference regardless of brand - this is becoming an issue when it isn't.
I have used Volvo spec Pirellis, Hankook, Michelin and now Continental on a SQ5, RSQ3 and S4.
Checked each time with Australia's No1 Audi dealership and there have never been any issue with these tyres choices from their perspective.
Notably the Hankooks were fitted to S4 from new and were not designated AO.

[shanov2]

Hey, they will void you. It's happened recently. The size might say it's 255/30 But actually the pzeros are specially made to match the rolling diameter of the 235/35 rears and therefore not true 255/30 tyres. If you don't want issues do what the whole community is doing and go 245/35 mps4s. They fit on 8 and 8.5 inch rims and keep the same rolling diameter. They cant dispute that.

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So are you saying its just the front thats the issue? Do the 235/35 mps4s match the equivalent p zero? Could I leave those on rear and swap the fronts to 245/35?

Thanks

[Remarcabull]

So are you saying its just the front thats the issue? Do the 235/35 mps4s match the equivalent p zero? Could I leave those on rear and swap the fronts to 245/35?

Thanks

No that's a different rolling diameter. Google tyre size comparisons you will see the differences. 245/35 front and rear is only solution unless you go aftermarket square rims.

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[redknob]

Am I missing something here?

255/30 has 76.5mm of rubber
235/35 has 82.25mm of rubber
245/35 has 85.75mm of rubber

If you go square all around, then your speedo calibration will off as your tyres are now 7mm taller, meaning you will be going faster than indicated (1.1% if the reference is the rear). Doesn't sound like a great idea to me.

Has anyone actually got out a tape measure on a brand new set of PZero AO tyres to compare if the total height of the tyre's match?

[Remarcabull]

Am I missing something here?

255/30 has 76.5mm of rubber
235/35 has 82.25mm of rubber
245/35 has 85.75mm of rubber

If you go square all around, then your speedo calibration will off as your tyres are now 7mm taller, meaning you will be going faster than indicated (1.1% if the reference is the rear). Doesn't sound like a great idea to me.

Has anyone actually got out a tape measure on a brand new set of PZero AO tyres to compare if the total height of the tyre's match?

This question has been asked in our fb group at least 60+ times. The Speedo is out usually 4%, so with 245 all round at 100 km an hour my GPS says 98 and is still within range. 100s of people run these with 0 issues and better performance, not to mention 40k kms of a set.

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