I bought my Wagon used back in June, and I just noticed (20,000 miles later) that one of my tires is a different model Michelin from the three others. What clued me in was that there was a lot less tread depth. I think it's a lower grade tire, and I would expect the tread to wear away more quickly than the others.

 

Anyway, I know that it's very, very bad to have mixed tire circumferences, especially with AWD. My question is this - are tire stores able to accurately measure circumference? If so, can they install a new tire that's the same model as the others and shave it down to match the rest?

 

Adam

Not that I have heard.. you should probably get 4 new ones.. nice fresh start

Check this link out...

http://usmb.ultimatesubaru.org/forum/showthread.php?s=&threadid=6507 for a good simple way to compare tire circumference.

 

Since yours is a manual, I belive that the difference isn't as potentially as damaging as with an automatic to the center differential, but someone needs to confirm that.

 

Also, mixed tires on any car can cause issues with handling and braking. If you can, get a new set installed.