Question about 2008 Porsche Cayenne

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I have to replace the two rear tires. Do I need to replace all four? If I replace just the two rear tires, do they need to be the same tread as the front tires?

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The ideal situation would be to replace all 4 at the same time with the same tread design like the manufacturer says. If you are like most of us that is hard on the wallet.
As a minimum tires must be replaced in pairs and should be the same make and tread design as the 2 that are still on the car.If you can't get the exact same tread design then make sure it is as close as possible. Bear in mind that mismatched tires can affect driveability especially if you pushing the car hard.
Your best bet would be to find a smaller Mom and Pop tire shop that specializes in tires and talk with them before ypou plunk down the cash. Shops that need to depend on repeat business are more likely to steer you in the right direction in terms of what you can get away with safely. Hope this helps.

Posted on Aug 29, 2010


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SOURCE: Slip Control Coming on Infinity G35 6 Speed Coupe with New Tires

Tire outside diameter will directly affect slip control. a 225/45/18 is smaller than 245/45/18. What is important here is the rolling diameter as each wheel sensor measures this and compares it to the others when it sees a difference like this that is constant you will get an error code or light. You will have to put the same size tires on all 4 wheels to correct this problem. Sorry to give you the news....

Posted on Aug 28, 2009

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