Taycan Problem - potential catastrophic tire failure

[Vim Schrotnock]

If you read my post and subsequent ones at the beginning of this thread, a couple things have been verified by numerous drivers.

1. There is extreme wear at the shoulder of the tire down to the cord, and there is NORMAL treadwear.
2. This is not an alignment problem. NORMAL treadwear and I posted my alignment data, which is normal.
3. Definitely check the sidewall on a regular basis - this is quite difficult to do because there are no 'wear markers'. My shop put my summer tires on after 'inspecting' them, and one failed a few weeks later.

I don't know if we've established that this is an issue caused by low ride height. At the time of failure, I was setting my car to normal shock and low suspension. I no longer do this, and we'll see if that makes a difference. It is definitely a serious safety issue, and anyone who experiences it should report to the NHTSA.

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[acull2000]

If you read my post and subsequent ones at the beginning of this thread, a couple things have been verified by numerous drivers.

1. There is extreme wear at the shoulder of the tire down to the cord, and there is NORMAL treadwear.
2. This is not an alignment problem. NORMAL treadwear and I posted my alignment data, which is normal.
3. Definitely check the sidewall on a regular basis - this is quite difficult to do because there are no 'wear markers'. My shop put my summer tires on after 'inspecting' them, and one failed a few weeks later.

I don't know if we've established that this is an issue caused by low ride height. At the time of failure, I was setting my car to normal shock and low suspension. I no longer do this, and we'll see if that makes a difference. It is definitely a serious safety issue, and anyone who experiences it should report to the NHTSA.

I can only imagine the sidewall flex/compression under load is causing this wear - and Porsche’s attempts to increase pressure is an easy lever to reduce sidewall flex (at the cost of comfort and possibly grip).

is anyone able to mount a GoPro or similar under the car pointing at the inner tyre shoulder (during a progressive drive) to see if this can be witnessed?

 

[Vim Schrotnock]

I can only imagine the sidewall flex/compression under load is causing this wear - and Porsche’s attempts to increase pressure is an easy lever to reduce sidewall flex (at the cost of comfort and possibly grip).

is anyone able to mount a GoPro or similar under the car pointing at the inner tyre shoulder (during a progressive drive) to see if this can be witnessed?

Wow - that would be an interesting video! Especially at different ride settings...

 

[chun]

For turbo and turbo s, porsche have been recommending 2.8 across all 4 for; and 3.0 front 3.1 back for full load (21 inch), since 2020.

This is not new.

I think they just didn’t expect people in 4/4s to be pushing their cars as much, hence the lower pressure recommendation for those.

 

[acull2000]

For turbo and turbo s, porsche have been recommending 2.8 across all 4 for; and 3.0 front 3.1 back for full load (21 inch), since 2020.

This is not new.

I think they just didn’t expect people in 4/4s to be pushing their cars as much, hence the lower pressure recommendation for those.

Assuming we're talking 5-seater saloon on summer tyre, Turbo/turbo S has been:

• 2.8 (half-load)
• 2.9/3.1 (loaded)

On GTS the TSB have always been:

• 2.6/2.7 (half-load)
• 2.8/3.1 (full load)

(@SoccerMan94043 I have no idea what's up with your door sticker, doesn't match TSBs!)

similarly 4S has always been:

• 2.7 (half-load)
• 2.8/3 (full load)

 

[SoccerMan94043]

(@SoccerMan94043 I have no idea what's up with your door sticker, doesn't match TSBs!)

I'll just consider this a pick your own adventure and make sure I'm between all three measurements

Based on the cost of the back tires, running those at 45 PSI might be a good idea if that could prolong some life. I value ride comfort more though.... so :\

For what it's worth, the door sticker came out (theoretically) after the TSB which was Dec 2024; my car started production in late Jan 2025, finished up in early Feb 2025 and delivered in June 2025.

 

[cityhpper]

Since I'm not a native speaker, I had the understanding that the latest TSB being referenced here is for J1.2 cars only, @acull2000?

But your understanding is that the increased tyre pressures are valid for all Taycans, from 2020 -> ?

 

[Jasper4S]

Assuming we're talking 5-seater saloon on summer tyre, Turbo/turbo S has been:

• 2.8 (half-load)
• 2.9/3.1 (loaded)

until the 28/2/2025 TSB where it increased to

• 2.8/2.9 (half-load)
• 3.0/3.2 (loaded)

On GTS the TSB have always been:

• 2.6/2.7 (half-load)
• 2.8/3.1 (full load)

until the 28/2/2025 TSB where it increased to:

• 2.8/2.9 (half-load)
• 3.0/3.2 (loaded)

(@SoccerMan94043 I have no idea what's up with your door sticker, doesn't match TSBs!)

similarly 4S has always been:

• 2.7 (half-load)
• 2.8/3 (full load)

until the 28/2/2025 TSB where it increased to:

• 2.8 (half-load)
• 3.1/3.2 (loaded)

I could not see it states in the TSB, but are the numbers the same for all MY's?

 

[acull2000]

Since I'm not a native speaker, I had the understanding that the latest TSB being referenced here is for J1.2 cars only, @acull2000?

But your understanding is that the increased tyre pressures are valid for all Taycans, from 2020 -> ?

The TSBs are specific to either J1.1 or J1.2 (as you rightly point out). Please don't misinterpret that the J1.2 pressures are approved for J1.1 cars.

I am merely observing that J1.2 started out with pressures identical to J1.1 (all three TBSs 16/9/24, 8/11/24, 3/12/24) indicating that there was no explicit rational (at the time) for J1.2 to be different (it's only a facelift etc). However the pressures have been increase by Porsche across most cars on the latest J1.2 bulletin dated 28/2/25.

Unfortunately I cannot find any of the TSBs for J1.1 after 20/1/2023, so can't confirm what we should actually be running at, or whether Porsche have also increased the J1.1 approved pressures. Can anyone can find the 2/7/23 J1.1 TSB (or later)?

 

[prj]

J1.2 and J1.1 is pretty much identical from this perspective, so I would run what is recommended for J1.2.

The Taycan Facelift has very small differences as far as tyre load is concerned, and just overall.
Apart from the AR addition, improved air suspension dampers, rear motor and new battery, the rest of the car is pretty much the same, at least physically.

 

[chun]

I have been running 2.8 across all 4 summer 21 inch for close to 6 years now, never had the issues mentioned here.

Have also been running 2.6 across all 4 winter 20 inch for 5 winters, never had the issues mentioned here.

So make of that what you will.

 

[jk981]

Is there anyone else not experiencing this issue? What car/tires/wheel size are you running? Maybe we can figure out the trend here.

 

[prj]

I did not have this issue on Pzeros nor other tyres I fitted to the car.
The Pzeros were completely worn out too when I got the car, barely above the legal requirement.

 

[figure1a]

Is there anyone else not experiencing this issue? What car/tires/wheel size are you running? Maybe we can figure out the trend here.

I think most of us are not experiencing these issues. If you search, it's pretty apparent that that inner wear down to the cords is due to people running the car in the lowered position (range or sport plus) which increases the camber. If you run your car lowered all the time, then have the alignment done when the car is lowered to avoid that inner wear.

 

[Vim Schrotnock]

I think most of us are not experiencing these issues. If you search, it's pretty apparent that that inner wear down to the cords is due to people running the car in the lowered position (range or sport plus) which increases the camber. If you run your car lowered all the time, then have the alignment done when the car is lowered to avoid that inner wear.

If this is the case, then shame on Porsche. Selling a car with a suspension adjustment that, if chosen, will result in a catastrophic tire failure is about as bad as you can get from an engineering standpoint. I'm not as sure as you about the cause... Has anyone done an alignment measurement in the lowered position?

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