15x8 steelies

FYI,
I ran 275/60-15s on 8.5s on my barracuda at 24/26 and still ran the centers off.
IMO then, 8s are a lil narrow for 275/60-15s on the street. At 30 psi you'll blow the center treads off them in no time. They'll probably need to go down below 26psi to wear evenly from side to side. If you spin them much, the centers will be gone in no time.
IMO
that size tire should go on at least 9s. Good luck finding those, so 10s will be fine.
But then, your 255s should be on 8s, so IDK how those are not burning off..........................