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Mixing different brands of tyre?


22 Dec 2004
Hi All,

Curently i have P-Zero's all round but i'm going to need some new rear tyres rather soon :twisted:
, and as i want to move away from P-Zero's, whats the view on keeping the fronts until they wear out , but changing brands for the rear? i.e Pirelli at the front and say Michelin at the rear?



Migration info. Legacy thread was 36528
Hi Warren,

I originally had Pirelli P zeros N2 all round on my C4S. Some time ago I needed to change the rears well worn, but could not get N2 so fitted N3 on the rears. Contrary to my initially thinking that it could not be to critical with this mix, the car became somewhat unstable, I certainly did not feel as comfortable and as confident as before. Thought of all sorts of things to do with tracking, suspension etc as I still could believe the different tyres were at fault.

Finally decided that the cheapest, easiest and quickest route wold be to change the fronts, still with 4mm tread and no uneven wear, from N2 to N3. Did nothing else but the car became completely different. I now have my confidence back and the car is much more stable, the steering better.

Frankly I could not believe that such a simple thing would create such a difference. I now have to accept that mixing on N ratings is not good, so mixing of brands would, in my opinion, be a disaster.

Just my views I am sure there are plenty of others.


Migration info. Legacy thread was 36534
Thanks Michael - anyone else?

Migration info. Legacy thread was 36539
I had a mixture of Conty Sport 1's on the front and Conty Sport 2's on the rear (and dare I say it but one of the tyres wasn't even N rated!)

and the only spin I had on these mismatched tyres was on a track day in a downpour going into Copse at Silverstone, although the rain was very heavy (wipers on full blast) and I did 'only' have just the legal limit of tread depth on the rear ! not a surprise that everyone else was tucked away back in the garages at the time !

Now I would never mix brands but this mix of similiar spec tyres on either axle didn't really give me an issue, even though I am on Michelin Pilot N2's all the way around, the handling differences are minimal.....

if I had to change the rears and Michelin no longer sold the N2 then just changing those to the available spec wouldn't be an issue for me...

but that is me.. I have opted for a normal handling set up and prefer to deal with any such handling issues, which means (theory being) that the car & myself are more able to adapt to such changes....

I can understand how Micheal had issues with his tyre mixing on is set up, as cars on more precise set ups are IMHO more vulnerable to such mis-matches... as with any car tyres they are the most important part of the package !

N spec tyres are important but personally I refuse to play into the corporate hands that change tyre spec's and phase out the old tyre spec, thus forcing drivers to change all the tyres at great cost....

Migration info. Legacy thread was 36546
i saw a 996 Carrera 4 tiptronic at my local OPC recently with a list of problems, although it was fully prep'd by a midlands specialist 4 months previously

The lady owner was telling me of a fault light on the dash


the fault was down to mixed brands of Non N rated tyres, 4 new tyres later the fault was gone

apparently C4's are very prone to this problem i'm told,

But i must say that theres alot of cars with Conti N1 & N2's on different axles as they dont make N1's anylonger with no ill effects

Migration info. Legacy thread was 36550
I was always told that mixing different makes of tyres was one of the quickest ways to become part of the scenery.

Migration info. Legacy thread was 36604
I'm not sure if it's gonna be dangerous as such if you don't drive it hard, but mixing brands surely will compromise the handing of the car. What I found over the yrs is that 993 is very sensitive to tyre conditions, suspension, geomatry etc.

Migration info. Legacy thread was 36609
How much did the car cost?
Whats your annual budget for repairs and maintenance?
If you had a Ford Escort I could understand why saving a few quid a year on tyres was important to you.
With a 170 mph car - why would you want to risk anything?
Imagine suggesting to Schumacher that he has Bridgestones on the front and Dunlops on the back!
A good set of well treaded tyres of the correct spec is the only thing between you and oblivion.
Whats so wrong with P-zeros that you want to risk your life?

Migration info. Legacy thread was 36654
Having had a real problem with the geometry on my car since I got it, it was supposedly set up (receipts) the handling was very twitchy and it scrubbed the rears our rapidly (whilst on holiday in Germany, where I had to fit what I could get my hands on.. pirelli assim, which were again scrubbed off by the time I got back home, yes 4 tyres in 2500 miles!) which I wasn't too bothered about as it had Uniroyal rainsports rear and some Nankang on the fronts, A strange combination to say the least. With that and the tracking out it has been .. interesting in the handling dept. to say the least. I took the opportunity to get some spare wheels and fit some ebay specials whilst I have had the original wheels refurbished and have fitted pirellis to the refurbished rears. I am waiting for some for the fronts at the moment so am carefully pottering around on the nankangs swopped to the front spare wheels and the rears are the ebay 'marshall power racers' ??? Anyway the grip is quite good .. far better than I expected considering I have a dispute with the company that set up the 4 wheel alignment and have to have the alignment redone, Iam keeping a close eye on the tyre situation both on the handling and wear situation! If I had to make a choice then I would definatly keep the same make and tread pattern all round. With a spare set of wheels then I am indulging in cheapo tyres to test the limit of the handling (carefully) which can only improve when I have the original wheels and decent matching tyres back on AND am satisfied the alignment is correct. Incidently the Nankangs seem to be excellent on the front and the Marshall Power Racers (any body heard of these ??) on the rear haven't given me any scares at all.

Migration info. Legacy thread was 36686
Previous poster said:
Quote: Originally posted by Stevo on 30 October 2005

How much did the car cost? Whats your annual budget for repairs and maintenance?If you had a Ford Escort I could understand why saving a few quid a year on tyres was important to you.With a 170 mph car - why would you want to risk anything?Imagine suggesting to Schumacher that he has Bridgestones on the front and Dunlops on the back!A good set of well treaded tyres of the correct spec is the only thing between you and oblivion.Whats so wrong with P-zeros that you want to risk your life?

Thanks Stevo !! :wink:

The problem with P- zeros is that they make my car tramline all over the place, to the point that it is dangerous.

I put on my winter tyres last weekend (Michelin )and the tramlining has disaperared, therefore it can only be the p-zeros.

I have spoken to my mech (who has a long time porsche experience - he was a Le Mans winner back in the late 70's )and he has also stated that p-zero's are not a good tyre for 911's running low, hard suspension, along with bigger wheels. They just tramline and due to the harder sidewall skip and bounce over bumps in the road.

It just seems such a waste to bin a set of front tyres that have done less than 5000 miles.............of course im open to offers on them

Migration info. Legacy thread was 36884
FWIW I changed the rears only on my BMW (same brand though) and the car handled horribly- stability light on even in quite modest cornering antics, and a really snappy lurchy feel. Has taken around 3k miles to sort itself out. The dealer blamed the different wear/grip rates on the wheels that was upsetting the stability control.

For the sake of the extra ££ I'd change the whole lot as it may ruin the feel of the car- you could always do the rears first, then the fronts if you find its a problem. You may get a better deal if doing all of them...

Migration info. Legacy thread was 36895
Ebay would seem to be the answer - or this sites' sales forum - that way you at least get some cash back.

One issue that came to me in the shower this morning is that of Insurance - I'd hate to be in the position of having a claim dismissed due to unmatched tyres - anyone in the industry have experience of this?

Migration info. Legacy thread was 36897
its nice to know that your thinking of me whilst your naked Stevo - :eek:

Migration info. Legacy thread was 36903
Yes it made a change from Brooke Burke or Kylie! :wink:

Migration info. Legacy thread was 36905
I always thought that 993s normally go through one set of front per 2 sets of rear. However I've been having to change all 4 corners for the last few tyre changes even with plenty of rubber left on the front, simply because I changed brands.

Never noticed the tramlining with P-zero though. Do you have 18" wheels for your summer tyres? as I re-call it is a common problem with bigger wheels.

Migration info. Legacy thread was 36909

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