LJ70 original tire size

[Spotlite]

Hi, i have Nokia 205/70r16 tires in my 1992 LJ70 2.4td, and the odo reads 110kmh when actual gps speed is 100kmh. I wonder what´d be better (larger diameter?) tire choice? Car is completely original w/out lift kits and other mods and it has 7x16" steel rims. Is original size 235/70r16? I´m running 80% city streets, 20% gravel. i´m thinking kumho KL78 or Hankook Dynapro RF10.