I like the 215 225 in 60 series for 15s, but thats with stock height or just slightly lowered stance.

 

I recently picked up a set of rims size 15 x 7 with 3.5 backspace and 15 x 8 with 3.63 backspace I realize these are not the ideal set of rims with that back spacing but I got a good deal on them and would like to try them out I am wondering which size tires I should run on these I know I may eventually have to roll the fender lips but I don't want to if I do not have to...any advice would be greatly appreciated
Thanks

 

By the way I am running a five lug set up with disc brakes again any help would be greatly appreciated thanks

 

Your fenders aren't going to be very happy with those backspacing numbers. I'm not even sure even with a skinny tire they would fit