[Joe240]

Honestly, you could order a square 19x9.5et38 and run a 5-8mm spacer in the front and the 15mm spacer in the rear. Then you could do 275/35/19 front and rear for tire rotation if you wanted.

Otherwise, the 19x8.5" wheels you could run an 8.5et46 (closest time suspension) at most and 8.5et18 (flush) at the least. But you'd probably have to run a 235 or 245 at either extreme to avoid rubbing (255 bulges a bit on 8.5" wheels).