Hello all. I am running 21's on my P85 (RWD) and have about 15,000 miles so far. Three of the tires looks like they can get 5,000 more miles, but one is low and so maybe another 2,000 miles. I've rotated every 6,000 miles and this winter, I swapped to 19 winters (I did not include the winter miles in the numbers above). I'm curious how many miles people are getting on their 21's. Can you please specific your model type as well. Overall from what I've read, getting near 20,000 miles on the 21's is actually pretty good. I have the Contisport summer tires. Thanks.