I bought 4 winter tires on 15 inch rims. My Wife has a Corolla with 15 in rims. Can I take her two front tires put those on my rear and then put two of the winter tires on my front end and the other two on hers? Yes that was a run on sentence. Or should I put all 4 on my car and pray for her.

 

I don't see why not, but you are not going to take full advantage of the tires like if you were to have them on one car...