Opinions please - tyre/tire wear

[sbarker108]

MY23 TTS.
Mileage: 14,000 (miles)

I have recently had to replace the two front tyres as the very outer edges have become detached (see photo).

No apparent balancing issues, no wheel alignment issues. The tire pressures have been set at the manufacturers pressure, or close too, it's difficult to tell with the app, car, and pump all giving different readings.

The tyre itself has even wear across the tread, 5mm across the 3 readings.
The outer edges, as you can hopefully see, don't seem excessively worn either.

The insurance policy I have is refusing to pay out as they are saying this is wear, probably caused by under inflation. Kwikfit (local UK tyre dealer) said it's difficult to say but that is the most likely explanation.

The new tyres, set to 40 by Kwikfit are apparently 43 according to the App but I'm sticking with what Kwikfit have done given this experience.

I'd appreciate peoples opinions and advice on if there is anything I can do?

I have written to Goodyear who said I can arrange for a warranty examination but the tyre has been taken away now and I'm waiting for a call back from Porsche to see if it's a known issue.


Kwikfit report: Your Vehicle Health Check

Images attached.

Sponsored

 

[Bennachie]

Are you running in low mode frequently? Is alignment all ok?

 

[sbarker108]

Are you running in low mode frequently? Is alignment all ok?

I am usually in Normal, but occasionally during spirited driving go to Lower (never low) but this must be about 30% of the time max. From an alignment perspective. It runs straight when I take my hands off the wheel, no veering to one side or anything like that.

I have had a challenge with tyre pressures I admit. I was trying to get the app to report no deviation from the standard 21" summer tyre half load pressures. This meant according to the compressor I was about 38/9 psi most of the time on the fronts which read 40 in the app. Quite a balancing act though.

 

[Fish Fingers]

Outer or inner edges worn?

 

[sbarker108]

Outer or inner edges worn?

This is the thing, no. If I was under inflated I could accept that if the outer edges were worn but judging by the grooves in the outer part of the tyre, which are fine, it seems like it's just the very outside edge, I'm surprised if it was even in contact with the road surface where it has gone (but assume it must be).

 

[Bennachie]

Weird that it is the same side on each of the tyres. Alignment you would expect opposites outside or inside edge of each, this appears to be outside of one, inside of the other. I suspect manufacturing issue.

 

[Murph7355]

You said "outer edges" but is that on the inside side of the tyre (nearest the suspension) or genuinely outside (the outside edge of the car)?

There are a few threads on this, the exact same wear. But usually it's the rears.

A forming view (on here) is that the camber settings on the car go too aggressive when the ride height drops, which may cause it.

I'm also wondering if the NF0 spec might have something to do with it... I wonder what was specified for the side walls and tread softness and whether some sort incompatibility causes premature/odd wear... If camber were the sole cause, I'd have thought the general tread would wear more towards that side of the tyre. But it doesn't seem to.

I have non-NF0 spec on the rear of mine so will see if they cope better (Hankook Ion Evos).

 

[kempez]

To me, a tyre lasting 14,000 miles seems acceptable. I've had quite a few high performance cars and they all wear tyres down before 14/15k miles. I do drive aggressively at times (on my own), so I accept that this is just generally the mileage that performance cars get on their tyres.

My other non-performance cars tend to last a decent amount longer, but they are driven slower and have (premium), tyres designed for economy, not performance.

I do agree that wear is more uneven than I would expect, but given how much the Taycan weighs, it's not a surprise that even a mild under-inflation leads to odd wear. And worth noting that none of my other performance cars weighed 2300 kg (C63 weighed 1700 kg for example)

 

[sbarker108]

To me, a tyre lasting 14,000 miles seems acceptable. I've had quite a few high performance cars and they all wear tyres down before 14/15k miles. I do drive aggressively at times (on my own), so I accept that this is just generally the mileage that performance cars get on their tyres.

My other non-performance cars tend to last a decent amount longer, but they are driven slower and have (premium), tyres designed for economy, not performance.

I do agree that wear is more uneven than I would expect, but given how much the Taycan weighs, it's not a surprise that even a mild under-inflation leads to odd wear. And worth noting that none of my other performance cars weighed 2300 kg (C63 weighed 1700 kg for example)

Fair point.

I'm just used to a tyre wearing out being based on the tread depth rather than anything like this. I would have normally gone with Michelin Pilot Sport 4s but it came with the Goodyears so thought best to stick with those. Goodyears lasted about 6000 miles on the Tesla M3P I had vs 18000 with the Michelin. Never rated them since but 14000 on the Taycan isn't so bad as you say.

 

[W1NGE]

MY23 TTS.
Mileage: 14,000 (miles)

I have recently had to replace the two front tyres as the very outer edges have become detached (see photo).

No apparent balancing issues, no wheel alignment issues. The tire pressures have been set at the manufacturers pressure, or close too, it's difficult to tell with the app, car, and pump all giving different readings.

The tyre itself has even wear across the tread, 5mm across the 3 readings.
The outer edges, as you can hopefully see, don't seem excessively worn either.

The insurance policy I have is refusing to pay out as they are saying this is wear, probably caused by under inflation. Kwikfit (local UK tyre dealer) said it's difficult to say but that is the most likely explanation.

The new tyres, set to 40 by Kwikfit are apparently 43 according to the App but I'm sticking with what Kwikfit have done given this experience.

I'd appreciate peoples opinions and advice on if there is anything I can do?

I have written to Goodyear who said I can arrange for a warranty examination but the tyre has been taken away now and I'm waiting for a call back from Porsche to see if it's a known issue.


Kwikfit report: Your Vehicle Health Check

Images attached.

Alas I think this could be attributed to wear and tear and some folk will say you've done well to get the mileage you did.

2.3T car will inevitably eat rubber and will invariably vary by brand of tyre with Michelin Pilot Sporr 4S+ lasting the longest (I got 20K miles on my 4S). My GTS runs Pirelli which I don't suspect will be as hard wearing .

If not alignment, balance or inflation then it can only be assumed normal.

 

[Bennachie]

Question of course is what is the correct pressure? Handbook, onboard system and door sticker all list different pressures!!!!!!!

 

[chun]

Seems just like old tires that have been stored badly to me, and then driven a bit around.
It's the kind of damage you see when that happens.

But as you say you have driven them around 14.000 miles; it is probably just regualr use. On this kind of a heavy car, expecting more than 20.000 is wishful thinking, and depending on road conditions 14.000 seems apropriate

 

[gtm]

MY23 TTS.
Mileage: 14,000 (miles)

I'd appreciate peoples opinions and advice on if there is anything I can do?

Kwikfit report: Your Vehicle Health Check

Images attached.

This is primarily wear from low tire pressure. The tire in the first picture of your post is flat, or almost. I'll assume the car wasn't driven this way. Both tires are worn on both very outer edges. One side to the cords, the other very close to the cords (blow up the pictures and this is pretty clear). I can't tell from the pictures or your description but my guess is the inside facing edges are the ones worn to the cords. A little negative camber, really wide tires and low pressure and the inside facing edge wears first.

14,000 miles isn't really all that bad but given the tread left across the face of the tire you should have gotten considerably more. Always set the pressure cold and get a decent pressure gauge. Based on the info on Porsche's "Good to Know" you should be at 39 psi cold. The 40psi, cold, that Kwikfit set your tire to should be about right. Warm day, highway speeds and pressures will go to 44 psi. Don't adjust your tires when you get home after a drive.

 

[D00notD00d]

Inner edges wear much faster, even with correct alignment. That seems to be the norm. The risk is you don’t notice because the inner isn’t visible. In my case the inside was also down to the cords and two thirds of the tyre was fine.

 

[W1NGE]

Question of course is what is the correct pressure? Handbook, onboard system and door sticker all list different pressures!!!!!!!

Go with the door plate as that matches what left the factory if still on original rims.

Sponsored