So my subaru "winter war wagon" shed a tire the other day and was wondering 1) I purchased a used tire that has a 3% deviation from the current tires, how much of an issue is this? 2) If this is an issue can I put it on a non "drive" wheel to minimize the consequences?
The car in question is a 1993 (POS that I love and has value of... scrap) with a manual.
If it's AWD, the only non-drive wheel is a spare. Just sayin'.
Well, you are not supposed to do that, but... my dad took his in to get new tires put on, and they put 3 205/70-15 and one 215/70-15, and since no one noticed until the tires were almost worn out and it doesn't seem to have hurt it.
in theory it is bad, in practice who knows, condition of car is gonna have alot to do with it... can you get the new tires shaved down a lil closer to the others...
3% i wouldn't worry that much, and with that generation of Subie's AWD system it should make that much of a difference unless you were approaching USAC Triple crown levels of stagger. 
Thanks for the input... I know its not ideal but the the car is a mangy cat I cant get rid of with its weepy eyes, worms and all, just dont want it to starve. per se... A stop gap measure to keep in moving and taking my ass to work
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