I own a Porsche 911 w/ AWD. Is it true that when changing the tires, you need to change all 4 tires, as opposed to just changing the tires that need to be changed? In my case just the two front tires. Someone told me that you will damage the cars stabilizer and make the car work harder if you do not change all the tires. Please advice.
Every make is different, I would consult your local Porsche dealer for their advice.
〉 Answered on Aug 1st, 2008 by Donna Burmeister, Service Manager at Classic Nissan
If the rear tires are in good shape, changing just the front should be fine. Most technicians rotate front to back, so even wear will be ensured. Make sure the air pressure is set to spec and tire rotation is usually recommended every other oil change.
〉 Answered on Aug 1st, 2008 by Suzanne Grego, Technician at City of Philadelphia Fleet Management
Generally, the rule is you do need to change all four tires at the same time.
An exception to this rule would be if the two tires you don't replace do not have much wear on them. If their tread wear level is within 2/32 to 4/32 of the new tires, it should be ok, just put them on the same axle.
Another option: some tire dealers are able to shave off tread, so they could remove some tread from the new tires to make them match the two older ones. However, it may just be more economical for you to get four new tires.
If there is a big difference in the amount of tread from tire to tire, the car's systems (drivetrain, suspension, etc.) could become worn or damaged faster.
〉 Answered on Aug 1st, 2008 by Denise Koeth, Managing Editor at Tire Review Magazine