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As mentioned in another thread I've just replaced my '98 outback with an '09 and I wanted to make sure my existing snow tires will work.


the snow tires from the '98 are "205 70R 15"

the tires on the '09 are "225 60R 16"


if I use the math from wikipedia



or the tool located here



I get a difference in circumfrence of about 1 inch, and a difference at the Speedo of about 1.25% with the snows being smaller and slower.


That does not seem like enough to worry about and in the past if run much bigger differences on some of the old POS cars I've had. But this car isn't a POS so I wanted to make sure these will be OK.



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