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REAR tyres

devans

devans

New member
I know there has been a lot of discussion around type/make of tyres and running pressures etc, but i can't seem to understand why i am only getting approximately 4-5K from my back tyres.

I use my 996 C2 with GT3 Aerokit every day....to and from work approx 4 miles each way...stop/start slow traffick. Gets a run on the motorway/A roads every other week. Have done 12K this year and have just had to order my third set of Pirelli P Zeros 265/35 ZR 18 (N4). Tyre pressure at the rear, set to 44 PSI and checked regularly. Wear across both tyres are even, well the centres of each tend to wear slightly more than the outer third or so.

Trouble is, every set i have had have all worn evenly. As far as i am aware, there have been no suspension mods/upgrades. Whilst i have replaced my front brake discs, i intend to do the rear ones soon.

Can anyone put their finger on possible problems or can someone give me an idea as to what mileage you are getting out of your rear tyres. I tried ordering some Mitchelin pilot sports (N2) which are the same price as Pirelli, but unless i was prepared to replace all four tyres Porsche insist on the N ratings all being the same. So i guess i will carry on with the Pirellis until the front tyres are worn enough. However, its costing me a fortune.[:(]
 
David

Sounds like you have similar use to me. I got about 12000 miles from my last pair of rear P-Zeros, and the fronts seem to be wearing at half the rate. My second pair have done about 6000, and are half worn. I don't drive it like I stole it, but I don't hang about. Most people say that the P-Zeros are noisy, but I don't think mine are that bad. Having said that, I'm going to try Michelins next time, just to see why everyone raves about them.

If you are getting even wear, I suppose it is possible that you could have a combination of too much negative camber (wearing the inside edges) and too much toe in (wearing the outside edges). It's a bit unlikely, but it would be worth getting it checked.
 
Despite Richards wear rate above your experience with the N4 Zero's is the same as several other 996 owners i know of, who have since switched to Michelin and achieving over 10k miles now from the rears. Earlier PZeros seem to be much better.
 
If the Michelin's last twice as long does that mean they have alot less grip ?

Im running the p-zero's, have done about 3k & the rears are very low now
 
The Michelins might have fractionally less grip, but they tramline less, especially under braking and are quieter.

Despite the aged looking design of the Michelins they give very good wet and dry grip.
 
I'm not questioning that what you guys are saying is true. But:

Working on the premise that:
a) I look to be getting about 12000 miles from 2 consecutive pairs
b) Pirelli would not produce a tyre with a design life of 3000 miles
c) Porsche tested and approved the tyre

You chaps having problems either:
1) Drive like hooligans
2) Do lots of track days
3) Have something wrong with your alignment
4) Have been unlucky with Pirelli Quality Control and there are quite a few dodgy tyres out there. This could well be the main issue, and is worrying.

I find the P-Zeros do tramline, which only appeared after a couple of thousand miles. I do find that the pressures of the fronts are quite critical to this, and if they drop 3-4 psi the tramlining is worse. The steering is heavier on my C2 with P-Zs than on my brother's C4 with Contis. The P-Zs tend to 'ping' on road joints a bit more than Contis, but I can't say I get a lot more tyre 'roar' or 'drone'. The P-Zs have a lot more grip.

Perhaps it is the luck of the draw, but am I the only one without problems?
 
after 7000 miles, 2 brands trackdays & a couple of days at the ring my P Zeros still have a fair bit of use left in them. The fronts are starting to go off on the outside edges, but without any more track time I would say they and the rears should be good till at least 10,000 miles. Grip has been really good, noise not an issue and overall very happy with their performance in the wet & dry. 4-5k seems well below reasonabe expectations for general road use
 
i killed a pair of rear continentals on my c4 in just under 4k miles , now on pirellis !

75pno
 
Crikey...hope the Pirellis last longer than that!!! The Bridgestones come in about £350 a pair, so at this rate will need two sets a year DOH!
 
996 c4 with MO30 suspension. Just about to change my Michelin Pilot Sports after about 12 k miles. They wear a lot on the inner edge due to camber so I changed them round on the rims to put the bald part to the outside and the good part to the inside. ( I am tight) Got some new Michelin PS for £600 for the pair but they are now an asymmetric pattern so won't be able to swap them on the rims when worn.[:mad:]

cheers,

chris
 

ORIGINAL: carnaby35

996 c4 with MO30 suspension. Just about to change my Michelin Pilot Sports after about 12 k miles. They wear a lot on the inner edge due to camber so I changed them round on the rims to put the bald part to the outside and the good part to the inside. ( I am tight) Got some new Michelin PS for £600 for the pair but they are now an asymmetric pattern so won't be able to swap them on the rims when worn.[:mad:]

cheers,

chris
Click to expand...

I'm sure I read that a 996 can have dodgy wear if you don't corner hard enough.
 
I'd be looking into a new alignment if I were you, my Michelins usually lasts between 12 and 15 000, and after I did the last alignment the inner wear got much better, even though I've got max camber.
 
I got 14,000+ out of my Pirelli P Zeros on my 997 C2S. Pirelli are now the Official Sponsors for PCGB.

Look out for some great offers in next month's Porsche Post on Pirelli tyres.

Brendan Daly
Operations Director
Chairman Motorsport.
 

ORIGINAL: AlexBell

I'd be looking into a new alignment if I were you, my Michelins usually lasts between 12 and 15 000, and after I did the last alignment the inner wear got much better, even though I've got max camber.
Click to expand...
^^^^^ +1

If they are wearing unevenly, then get an alignment check done. I used to get 12,000 from the rears (Pirelli and Michelin) on my C2, and the wear was perfectly even across the tread.

There were several reports of Contis lasting only about 4000 miles (me included, on my Turbo) but I think that iit is resolved now.
 
My C2 Manual with M030 suspensioin and LSD has worn the tyres down nice and even, however would have liked something nearer 10K from a set, dont want to slow down so might have to change tyre brand, but would have to change fronts as well I guess?
 
Have so far done12k with N2 Contis on my 996 C4S with plenty left..... purchased from Event Tyres.....

hth

Paul
 
Sounds good, how much for the contis? N2's? My Bridgestone's are N4's does that mean N2's are harder wearing?

Bst
 
I paid £717 for all four back in 2010, currently around £100 more....


I think the N rating numbers are just the progression of development of the tyres not anything to do with compounds but I stand to be corrected.....

hth

Paul
 
First thing, as has been mentioned, is a "proper" geo set up from somewhere like Centergravity. I get around 14k miles from the rears on mine as a result - they are Bridgestone too which I think will have pretty much the longest life of any of the "N" brands. Secondly, where are you paying £350 for a rear tyre? I get mine from a certain online provider and currently 305/30/19 Bridgestone N1s for my 997 turbo are £250 ish delivered (I then pay around £12 per corner for fitting).[:)]
 
Hi Captin,

agree something I should get done, as the wear was nice and even on both back tyres didnt think it could be that far out, but would be good to get it checked out..not many people seem to be using Bridigstones but they were on the car when I brought it and seemed to be a good match.

Sorry I am paying £350 a pair fitted balanced new valves, which I didnt think was too bad! If they are half price of other brands brands then I can get through two sets a year at no additional cost, always nice to have some new rubber!

Bst

Andy
 
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