ACD & tire diameter question
Sep 19, 2005, 11:32 PM
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ACD & tire diameter question
I brought my car in today to America's Tire to get a tire patched and ended up having to replace two tires because of excessive wear on their inside. So right now I have new 255/40/17 Falken Azenis RT-615s up front and the OEM 235/45/17 Yokohama Advan A046 in back. The difference in tire diameter between the Advans and the Azenis is 3/10", but considering the Advans have 12k miles on them I'm guessing it may be as high as 1/2" because of tread wear. How will the ACD react to this? Will the drivetrain be OK (center differential clutch) or should I grab my ankles and throw another $400 at two more tires.
BTW...I got the car aligned right afterwards too.
BTW...I got the car aligned right afterwards too.
Last edited by Steiner; Sep 20, 2005 at 12:17 AM.
Sep 20, 2005, 05:34 AM
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I had 2 new tires (back) on my car from 5,000 to 20,000 miles and I had no problems other than uneven wear (even tho I rotated them. It would be good to replace all the tires when the originals wear out tho.
Sep 20, 2005, 08:02 AM
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Originally Posted by Steiner
Fourdoor...why is it so crucial I replace them right away?
The new tires are on the stock rims.
The new tires are on the stock rims.
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Sep 20, 2005, 08:06 AM
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Your front wheels are making 806 revolutions per mile, and your rears are making 796 per mile. Your center diff is eating those extra revolutions and it'll probably eat itself soon.
Sep 20, 2005, 08:11 AM
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Wow I'm glad I asked. I didn't realize that 1.3% would be that much (or even any) strain on the center differential. Can anybody tell me how the ACD is compensating for the different diameters right now so I can get a visual.
Sep 20, 2005, 11:16 AM
#11
Originally Posted by Steiner
Fourdoor...why is it so crucial I replace them right away?
The new tires are on the stock rims.
The new tires are on the stock rims.
Keith
Sep 20, 2005, 12:27 PM
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Ordered 2 more Azenis and while I'm waiting the guys over at Americas Tire are letting me drive around on a full set of Pirellis P-Zeros. Thanks for the input guys. I had no idea. The Evo is my first experience with AWD.
