Quote:
Originally Posted by Blubaron79
I always wear my rear tires out first. After a week I'm sure I'm off by 20%. Ran my 2009 xdrive hard to 120k miles. Never a problem. (They were staggered too)
Just don't run different tires.
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There's no possible way you could be off by 20%. That's like having a 30" circumference tire and a 24" circumference tire.
The stock 19" wheels using a 225/40/19 and 255/35/19 have rolling circumference of roughly 26" of which a one percent difference would put you at 25.74". Considering the tread depth of the Potenza S001 RFT is only 10/32 of a an inch or .31", you'd have to have a new tire and an almost bald one to have them more then .26" in circumference difference.