Comment about mixed tires and ? on cheap tires
09-27-2011, 06:10 PM
#16
09-27-2011, 06:26 PM
#17
Race Director
Mixing tires is bad because you're putting contact patches with different grip properties on the same car...made worse by doing it to a vehicle that's already got some interesting handling quirks due to the engine hanging behind the rear axle.
It's like going skiing with two different models of skis strapped to your feet...or playing basketball with a Nike shoe on the left foot and a Reebok on the right--leads to problems that you might not be prepared for.
It's like going skiing with two different models of skis strapped to your feet...or playing basketball with a Nike shoe on the left foot and a Reebok on the right--leads to problems that you might not be prepared for.
I'd tend to agree with you on tires if I was driving at the limit on a track, or flagrantly exceeding posted speed limits all the time(ie. autobahn speeds here in the US), but tires that aren't outdated time wise, with decent tread...nah, I'm not buying it.
09-27-2011, 07:32 PM
#18
Yeah - we are not in Germany running flat out on the autobahn ... in the wet - then for sure i would only go with n-rated. At US highway speeds and even the occasional burst to low triple figures - other options give more value for the money. Of course if money is not an issue and you want to go with the best then upgrade to a 997.2 and PSPs....
09-28-2011, 10:41 PM
#19
Team Owner
http://www.6speedonline.com/forums/9...x-ps2-v12.html
It's true that most of us aren't on the autobahn every day, but if you drive your car like a Honda Civic at all times, what's the point of getting a Porsche in the first place? There's plenty of information available about the disadvantages of mixing tires (there are no advantages), so if y'all choose to ignore it, that's your problem. I've also seen people in this forum claim that summer tires are fine in the winter as long as it's dry (!?!).
Anyway, there's nothing more dangerous than Joe Sixpack driveway engineering something he doesn't know about. You'll never find a tire company engineer that says it's OK to mix tires with different grip properties, sidewall stiffness, tread patterns, etc, and that's good enough for me.
Here's a question: do you guys see a problem with using four different brands of tires on your Porsche? Why or why not?
It's true that most of us aren't on the autobahn every day, but if you drive your car like a Honda Civic at all times, what's the point of getting a Porsche in the first place? There's plenty of information available about the disadvantages of mixing tires (there are no advantages), so if y'all choose to ignore it, that's your problem. I've also seen people in this forum claim that summer tires are fine in the winter as long as it's dry (!?!).
Anyway, there's nothing more dangerous than Joe Sixpack driveway engineering something he doesn't know about. You'll never find a tire company engineer that says it's OK to mix tires with different grip properties, sidewall stiffness, tread patterns, etc, and that's good enough for me.
Here's a question: do you guys see a problem with using four different brands of tires on your Porsche? Why or why not?
09-29-2011, 05:51 PM
#21
RL Community Team
Rennlist Member
Rennlist Member
The rating is not the issue here. It's the mixed grip.
Keep in mind that each tire manufacture makes a different size 295/30/18. If you don't believe me check for yourself. This in itself can throw off your stability control.
The mixed up compounds in rubber will totally destroy the Porsche handling. You are better off replacing 4 cheap tires then just two.
This way your car will be better balanced with similar grip on all four corners.
Have you guys ever tried driving in snow with only two winter tires? It's the same effect.
Keep in mind that each tire manufacture makes a different size 295/30/18. If you don't believe me check for yourself. This in itself can throw off your stability control.
The mixed up compounds in rubber will totally destroy the Porsche handling. You are better off replacing 4 cheap tires then just two.
This way your car will be better balanced with similar grip on all four corners.
Have you guys ever tried driving in snow with only two winter tires? It's the same effect.
09-29-2011, 06:24 PM
#22
Rennlist Member
My response to this is relatively useless for you since you have already made up your mind to mix the tires on your car. If you are only driving on dry roads, at or below about 50 MPH, then going cheap is up to you. Although, I do agree with those above who question why you even own a Porsche in the first place if you need to go cheap and choose off-brand non-spec tires.
Get a Camry.
I know, that sounds arrogant. But mixing tires on a Porsche means you are discounting any value in all the engineering and factory safety recommendations against doing so. I hope those three kids are wearing their seatbelts whenever they ride with you.
Get a Camry.
I know, that sounds arrogant. But mixing tires on a Porsche means you are discounting any value in all the engineering and factory safety recommendations against doing so. I hope those three kids are wearing their seatbelts whenever they ride with you.
10-01-2011, 01:13 AM
#23
Nordschleife Master
Interesting to read all the responses. Everyone is entitled to their opinion. Here's mine.
I have two sets of wheels. One set for the street, one set for the track.
For the track tires, they are always the same brand, always the same R-compound, always bought as a set of 4. The car is driven at the limit, there should be no compromises. I've been doing it since the car was new in 2002.
For the street tires, I buy the cheapest, the one that is on sale, and can have different tires front and rear. I currently have old P-Zeros in front and new Sumi's in the rear. I would NEVER drive this combo on the track. On the street, I would NEVER drive these tires close to their limit. Sure, I'll go over the speed limit, run 75 or more in a 55 zone, maybe take a corner a little faster than I should, but these are nowhere close to these street tires limits. I don't think mixing tires is stupid. I think driving on the street at or close to a street tires limit is stupid. The only place to drive a Porsche like a Porsche should be driven is at the track.
I have two sets of wheels. One set for the street, one set for the track.
For the track tires, they are always the same brand, always the same R-compound, always bought as a set of 4. The car is driven at the limit, there should be no compromises. I've been doing it since the car was new in 2002.
For the street tires, I buy the cheapest, the one that is on sale, and can have different tires front and rear. I currently have old P-Zeros in front and new Sumi's in the rear. I would NEVER drive this combo on the track. On the street, I would NEVER drive these tires close to their limit. Sure, I'll go over the speed limit, run 75 or more in a 55 zone, maybe take a corner a little faster than I should, but these are nowhere close to these street tires limits. I don't think mixing tires is stupid. I think driving on the street at or close to a street tires limit is stupid. The only place to drive a Porsche like a Porsche should be driven is at the track.
10-01-2011, 08:50 AM
#25
Race Director
Interesting to read all the responses. Everyone is entitled to their opinion. Here's mine.
I have two sets of wheels. One set for the street, one set for the track.
For the track tires, they are always the same brand, always the same R-compound, always bought as a set of 4. The car is driven at the limit, there should be no compromises. I've been doing it since the car was new in 2002.
For the street tires, I buy the cheapest, the one that is on sale, and can have different tires front and rear. I currently have old P-Zeros in front and new Sumi's in the rear. I would NEVER drive this combo on the track. On the street, I would NEVER drive these tires close to their limit. Sure, I'll go over the speed limit, run 75 or more in a 55 zone, maybe take a corner a little faster than I should, but these are nowhere close to these street tires limits. I don't think mixing tires is stupid. I think driving on the street at or close to a street tires limit is stupid. The only place to drive a Porsche like a Porsche should be driven is at the track.
I have two sets of wheels. One set for the street, one set for the track.
For the track tires, they are always the same brand, always the same R-compound, always bought as a set of 4. The car is driven at the limit, there should be no compromises. I've been doing it since the car was new in 2002.
For the street tires, I buy the cheapest, the one that is on sale, and can have different tires front and rear. I currently have old P-Zeros in front and new Sumi's in the rear. I would NEVER drive this combo on the track. On the street, I would NEVER drive these tires close to their limit. Sure, I'll go over the speed limit, run 75 or more in a 55 zone, maybe take a corner a little faster than I should, but these are nowhere close to these street tires limits. I don't think mixing tires is stupid. I think driving on the street at or close to a street tires limit is stupid. The only place to drive a Porsche like a Porsche should be driven is at the track.
