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Tyre damaged *!$*! - anyone got a part-used 20" P-Zero Corsa? - Ride/Handling/Suspension/Brakes/Wheels/Tyres - The Lotus Forums Jump to content
TomE

Tyre damaged *!$*! - anyone got a part-used 20" P-Zero Corsa?

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Got to work today and noticed an L-shaped cut on the rear tyre:

UL_2012-07-19_19.37.17_LR.jpg

(by the T of XT at 4 o'clock)

UL_2012-07-19_13.21.40_rotate_LR.jpg

It's an oblique slash rather than perpendicular to the tyre wall - I can lift up the edge of the flap of rubber. I'm certain it wasn't there when I put the car away on Sunday after the Newlands meet so must have picked it up on the crappy Surrey roads this morning. Pot holes all over the place but I don't remember a particularly heavy impact and there's no visible damage to the wheel as you can see. So a bit puzzled how this has happened.

I guess if I put a new tyre on I need to do both rears to avoid possible handling problems with one at 4-5mm and one new? If anyone has got a part worn Lotus spec Pirelli P-Zero Corsa LS 275/30 ZR 20 I'd be very interested.

I stopped on the way home to get pictures of the three worst areas of potholes and am mulling over putting in a claim to the council given the cost of these things. Best price I can find is Camskills at £427 each excluding delivery & fitting or Event Tyres at £442 fitted. Anyone done better?

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How deep is the cut? Being so low profile, these tyres have very thick sidewalls so it may be ok if the cut isn't too bad. I can find out the sidewall depth for you if you like?

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That could be handy, though I might need an official verdict on whether it's safe. It is about 3-4mm into the sidewall and I can just see some non-rubber material at the bottom of the split:

UL_2012-07-20_00.15.10_LR.jpg

Chap at work mentioned vulcanised repairs. Anyone know about them?

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sorry thats a FAIL :censored:

Edited by mc21.8

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As mc21.8 said above.

It's gone through to the braiding, that is not safe or repairable.

Ged

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I know how you feel :censored: Happened to me last year on both left tires by coming too close to a sharp edge on a curb. Fortunately it was sufficient to change only these tires, as all tires were still fairly new.

In judging whether its necessary to replace the tire I always try to imagine what would happen if the tire would fail while running at high speeds. I always reach the conclusion that I don't want to find out and that is why I then replace it. A friend of mine did have it hapen to him. While he had no problem coming to a safe stop, the disintegrating tire did destroy everything within reach from inside the wheel well (up to and includng the headlamps)! :vava:

Edited by TBD

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That sucks. I was worried the same thing might happen given the sometimes questionable roads in NYC and experience I had replacing several run-flats and two rims on my BMW. That, combined with the high price of the diamond cut wheels and P Zero Corsas led me to pull them on arrival and put on classic wheels for road use and save the diamond cuts/Zero Corsas for track days. The roads are probably better where you are, but for here the math made sense.

Anyway, I'm with Thomas--a compromised tire is a compromised tire, period. Be safe and replace it.

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May be worthwhile trying F1 Autocentres

http://www.f1autocentres.co.uk

They list them fitted as £391.20, although its not a certainty that they will be able to get hold of them, as I ordered the 19" PZero MO1 Rears for my N/A Evora, which they couldn't supply, but they did offer me Michelin PS2 MO1's for the same price, and they reduced the PS2 MO fronts to close to the Pzero fronts, so I got the whole car rebooted for £742. They have fitting centres in Crawley and Basingstoke as your in Surrey.

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Thanks for all the input. Beginning to wish I'd bought the tyre insurance the dealer tried to sell me when I picked up the car 6 weeks ago! But in 25 years of driving I've never had any tyre damage.

I've been recommended a specialist tyre repairer near me who do a lot of motorsport work. I've emailed over the pictures for their advice on a vulcanised repair. If that's ruled out then I'll replace.

Given that I'm at 4-5mm on the rears, should I be replacing both rather than just the damaged one? I think new ones are 7mm?

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I had a Pirelli Pzero Rosso front tire that had a manufacturing defect... Started to fall apart in the middle of a 2000mile trip.

The rubber didn't knit together properly, so there was a weld line that started to fall apart.

PA061694.JPG

PA061695.JPG

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Better it fell apart in the middle of a trip than in the middle of a corner.

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A quick update: the tyre repair specialist thought it was borderline from the photos and wanted to see the damage for himself. Took the car over yesterday and sadly the view was that it can't be repaired. The cut has gone a fraction into one of the braids so that's compromised. Interesting though that if it had been just in the rubber then it would have been OK to repair and use right up to rated max speed, on track etc.

I've a dilemma now, as I've a trackday booked for 1 September. If I fit new tyres with 7-8mm of tread I'm going to get a lot of tread block movement on track, which will heat the tyre more and accelerate wear compared to a scrubbed set. So if anyone has a part worn Corsa (single or pair) I'd happily take them off you for a sensible price. If you're about to replace a pair that are at 2-3mm I'd be interested in them for 100-150 miles use on track in exchange for a contribution to your new set.

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I've seen this before. From the looks of it, the cut was caused by a pinch in the tire wall. It wasn't something that nicked it.. If you look at the line running along the tire, it curves around the cut. And if it is pinched, it means there is probably more damage than you can see on the interior. This is exactly what happened to my tire.

I would most definitely replace the tire. Your life is worth more than a $600 tire. Don't take that chance.

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Ouuch that does hurt. I have a similar problem with mine with nearside tyre badly worn on the shoulder but loads of tread left in the middle and on the OS side. Do we have to replace 2 rears together as the tyre salesmen would lead us to believe?

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Yup, makes lots of sense to change an axle at a time.

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Without doubt both need to be changed , I would never take the risk it's the difference of smashing up the P&J or taking a perfect line in a bend

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Always change both. It's like an actual rule. And, if you don't, what you gonna do when the other one needs changing?

It's what Ron Burgundy would do.

Seriously.

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