Sachin Misra

It always seems like I'm replacng rear tires. Ratio of 3 to 1. I'm assuming thats normal for a rear engine car.

I've Dunlops all the way around, and its time to change the rears again. Is it ok to put a different mfr's tires in the rear or is that a big no no?

Eric in Chicago

Diff. sets front and rear, big <img src="graemlins/nono.gif" border="0" alt="[nono]" /> your rear to front wear raito is pretty much correct with our rear engine cars. Check previous posts, I raised this same question a few months ago got some great answers.

FlyYellow

There isn't anything wrong from a safety perspective of putting different fronts & rears. I certainly wouldn't mix left right but front back is ok. It is less optimal in that you will have different handling characteristics across the front/rear. But for the most part that isn't a problem unless you are tracking or autox'ing the car.

and yes since the mult-link suspension the rear tires are consumed at a far greater interval. one way to look at it is everytime I change my oil I change my rear tires.

my 2 cents.

cheers,
boris

Greg Fishman

[quote]Originally posted by Boris Teksler:
<strong> But for the most part that isn't a problem unless you are tracking or autox'ing the car.

</strong><hr></blockquote>

So what do you do when you have to avoid another car or a deer? Just drive at 80%?

Replace tires with the same brand and model on all 4 corners. You are driving a Porsche not a Toyota Camry.

Think of it this way: The right tires cost a lot less than body work. Ever priced what a front or rear fender cost? Two or three times what a set of tires does.

kary993

I tend to agree that you should put the same brand tire all the way around. I have been forced in the past at track events to have different brands from front to rear so I could keep running in the event. It worked out ok, but the handling characteristics were a bit strange. So stay with the same brand if at all possible.

FlyYellow

funny how people always think you are getting a cheaper tire vs. a more expensive one. i had s02's in the past and when my fronts wore i put on khumo victoracers. in any case i ran that combination for a bit and my handling improved from s02's all the way around. so i guess i spared that deer after all.

in general i would not recommend cheap tires to anyone. but fewer companies make cheap tires in the porsche sizes. i would give the pirelli pzeros, bridgestone s02/3 series, yokohama avs-int and finally the dunlop sp8000 all thumbs up for street. although i would go for khumo's ectsa 700 based on the cost i think they compete with all the above for substantially less.

Greg Fishman

Boris,
Just because you say your handling imporoved doesn't mean it actually did. Are you sure you were even near the limits of your car or tires? If not, any combination of tires would work fine. Problem is that when you are at the limits one tire may react differently than another and at 100mph or in an emergency situation it is not the time to find out.
This wasn't about cheap tires. If you want to run cheap tires, great. Just run them on all four corners.

Maybe next time it won't be a deer, but someones family.

Viken

I agree with Greg. It is not about cheap tires but two different compounds on each axle. I can only imagine the grave consequences of having R-compound (Victoracer) in front and street tires (S-02) at rear while driving the car at or near its limits.

scott watkins

"Just because you say your handling improved doesn't mean it actually did."

snip

Spoken from a MAN pushing it to the edge, NOT.

When are you "so called racers" going to climb down off your horses???

I will guarantee you; there are not any folks on any of these boards pushing their 911's to the edge. However, it is a never ending source of entertainment <img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />

Viken

[quote]Originally posted by scott watkins:
<strong>I will guarantee you; there are not any folks on any of these boards pushing their 911's to the edge. However, it is a never ending source of entertainment</strong><hr></blockquote>

Ah, words of wisdom. Especially, coming from a person who believes 36/44 are the ideal tire pressures for the 911 or the 993 or even the 996 or whatever.

993RS

[quote]Originally posted by Viken:
<strong>

Ah, words of wisdom. Especially, coming from a person who believes 36/44 are the ideal tire pressures for the 911 or the 993 or even the 996 or whatever.</strong><hr></blockquote>

Ah no, please let's not start that all over again...

<img src="graemlins/icon107.gif" border="0" alt="[icon107]" />

scott watkins

I should have said, "want to be racers"

Viken please, that is not what I said. And the last time you put your car, bike, trike, etc.. on the track to race was when???

When you begin racing "anything" and getting paid for it, come and talk to me.

Eric in Chicago

Scott,
A questions was asked, answers were given. As Sachin did not ask for track advice vs. street advice but a open question, I think the answers give him good advice. What he does with that advice is his own business. The internet and this board are full of so called experts, one must make their own choice as to what advice to take and what to ignore. When it comes to saftey, I will always err on the side of caution. Which is why I would never mix front/rear, side to side tires. Viken and Greg are some of the more respected members of this community, real world advice shared with the group, what's up with the "wanna be racers" comments? I dont think I have seen any posts here about someone professing to be the next Shumie,Mario,Bell ect. <img src="confused.gif" border="0">

Nol, 95 993 C4

I am firmly in the conservative camp here. Answer to the question: tires are a key safety item, like brakes, no messing about them IMHO. And nothing improves the feel of a car, any car I owned, compared to decent new rubber.

However, I cannot imagine reaching the limits of my 993 on the road. Ever. Here's a quote from John Miles in Autocar 1978 about the 930 Turbo:

"In the final analysis it will bite the lunatic or the unwary, but at cornering speeds almost inconceivable on the road"

And he was talking about 260 HP in a much less sophisticated 1140kg (2500lb?) 911. (C&SC 8/99)

Enjoy <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />

Nol

Greg Fishman

Scott,
First of all, what does this post have to do with racing? I don't think that was mentioned anywhere.

I am on no high horse. You are right, I don't push my street car to the limit, nor would I recommend anyone doing so, there is too much risk. But accident avoidance might necessitate using 100% of the cars ability and having it prepared correctly might save your or another parties life. I won't make any apologies for that statement.

I do a decent job getting to the limit with my race car though. I have had several pro drivers in my car and I am within a respectable margin of their times. My ambition is not to make racing my avocation. I could easily become a "pro driver" as could most with proper funding and average ability.

What makes you so "qualified" to judge others?
What tracks do YOU run, and what pro races have YOU done lately? Scratch that make it any race that you have done lately.