if you go with a 15 rim you really need 3.75 back space. No matter what width you go with be it 8 or 10. i would not run a 10" rim for a 35 on a 15 for off road. On a 8" you can run them at least at 8 pounds, no bead locks. Rather good side wall to tire ratio. like a 37 on 17.
Yep they do stick out more. You are 1.5" wider than a jk on 4.5BS say on 17x9 35x12.5x17. 4.5" wider than stock. The good thing about 15" is the price of the tire up to 35. My last set were 195$ each for MTRKs 35x12.5x15 . Going bigger you might as well run 17" as the price evens out 37. I would not spend much on 15"s rims. especially if going wheeling. I paid like 45$ each for the steel ones i have had on or JKR. 5 were the cost of 1 good alloy. i run 27 psi street.
you see here were the rims is very close to the tie rod, those are Synergy one's