Welcome, I tried several tires on the rear. 255 275 295 they are all fine I hnow 305 and 315 will fit , But you need the correct rim for the tire.
Tirs size =
275 = width
40 = Side wall or Aspect rartio
so 40% of the 275 is the height . The smaller the # the smaller the sidewall and height.
Then rim size .
Nice set up 285 40 18 on the back, like a nitto .
But you need a 9-10 " rim Peace
