12 inch slicks on a 10 inch rims?

I used to run 12 inch bias ply's on 10 inch rims. They were protrac N 50's best I can remember. After several miles and lots of burn outs they would wear uneven on 1 side as can be seen in this picture. A buddy of mine ran the same size on his car with 12 inch rims and his wore more even.

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