So I got my G back last May and at the time didnt know much about what tire sizes i wanted on my new rims so i just went with what Discount Tire suggested. The rear has never looked quite right to me, and i checked to look what tire sizes they put on my rims. I have 19" R-1 Hypes 19x8.5 and 19x9.5 with 255/35/19 and 275/30/19. Is that the right size to have on the back?

Thanks for any help!