Choosing the right tires & sizes for my Duster

I would say those tires on would fit on the back no problem. I ran stock 15 ralley's on mine for a while but not sure of back spacing.

I would drop the front size to 205 70 15. a 215 70 15 is 3/8 taller than your rear tire and may look kinda funny, but it's up to you..