I have a chance to get 4 tires and rims for my 93 awd automatic legacy, 2 are almost new the other 2 look only about a 1/4 way to the wear bars worn. I don't have the chance to measure circumference, they are the proper 185/70x14 size. If I get them will they screw up my tranny? looking at them standing there is no or almost no discernable size difference. Thanks

The best way to tell is that they all need to be the SAME TIRE and within 1mm treadwear. AWD cars are VERY sensitive about this. Buy 4 new tires and rotate regularly. If you can see a tread depth difference, you can bet it is way too far off.

 

Rich